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Matt Barret
Dodge Dakota
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5/20/2002
21:35:55
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 Subject: Leach PCM flash was overwritten!
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I'm preparing to install the HO cams and intake, and possibly a set of FM injectors so I was thinking about sending my PCM back out to Mike Leach & Co. to have them breathe on it one more time. I recently read a few threads here that talked about the dealer flashing over the custom programming. For some reason I got to thinkng about a trip to the dealer I made about 18 months ago when I was having some MAP sensor issues. I started wondering, maybe they reflashed my PCM and I did'nt know it? So I called Leach and told them that I wanted to send it back to them to at least confirm the original "Leach" burn was there.
They told me to look at my PCM and see if there was a sticker on there that said "software update", so I go out there and look and OH MY !! there it was, plain a day!! So for a year and a half I've been running with out the PCM burn!!
All those low 14 sec runs have been minus the Leach PCM !! :) (insert big ass grin) SOOooooo I will be shipping the PCM back out to Leach for them to reflash!!!!!!!!!! :)
So lets see, I'm adding the cams, intake, PCM flash, and the newly gutted Cat... thats in addition to the 218 rwhp I had already pulled..
hmmm, Hey Duner ?? you out there man ;) ??
Any guesses on the rwhp # now ????
I love this truck!
Matt Y2K-HEMI
'00 RC 4.7L 5spd 3.92 LSD
14.23 @ 94.49 ( minus the Leach PCM)
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CW
GenIII
5/20/2002
21:41:31
|  RE: Leach PCM flash was overwritten!
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I would like to see the numbers after everything is done because I have the same mods except the TB and flash. This damn 3000 foot air keeps me at high 14s on stock radials and 87 octane gas.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Matt Barret
Dodge Dakota
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5/20/2002
21:49:10
|  RE: Leach PCM flash was overwritten!
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CW, Last October I turned a 14.48 on street tires. (Elev 100') he hee, That was my best ever run on radials. I have since sold my slicks, so running low 14's went out the window :), however, hopefully with everything I'm about to do I'll be back down there again, on street tires this time. To be honest I'm more interested in the Dyno numbers, they are MUCH MUCH more consistent for comparison. Drag racing just has too many variables!! :) But racing is much more fun !! ha haa
Matt
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CW
GenIII
5/20/2002
22:22:54
|  RE: Leach PCM flash was overwritten!
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Yeah gotta love jammin' those gears. Hmmm so cutting 14.90s pretty consistantly isn't so bad at 3000 feet and 87 octane. Been thinking on getting a ICON controller to dial up the timing. Takes a long time to get stuff across the border or I would send my PCM in. Buying another one and flashing it gets way to expencive, over a G Cnd.:(
Still corrected times are 14.33. Need to put on some spring clamps to help stop the wheel hop. My best runs are always the ones with no wheel hop.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
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Matt Barret
Dodge Dakota
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5/20/2002
22:36:49
| RE: Leach PCM flash was overwritten!
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Message:
I'd say 14.9's are VERY respectable at 3000', especially on street tires. All of my low ET's were using some cheap Lakewood traction bars (for wheel hop), I did'nt get the caltracs until after I got rid of the slicks. I had a set of those spring clamps, but they did'nt do much for my wheel hop. A low Barometer reading will also have a poor effect on your ET. I have notice dramatic changes in ET from a low Barometer to high.
Around here the pressure generally stays around 30+, which is decent. If the pressure reached 28 or 29 my ET's dropped WAY off !!
BTW, did you drain your cooling system when you swapped intakes ?
Matt
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Lesley
GenIII
5/20/2002
22:48:51
| RE: Leach PCM flash was overwritten!
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CW, what I wouldn't GIVE for 14.9!!
97 3.9 CC Sport. Black. Auto 3.55, Quick D Intake, JBA Stainless headers, Autolite 3923s, stainless Borla Turbo XL, V8 TB, FMS 19 lb fuel injectors, 17" Boyd Coddington Smoothies. Have, but not installed: JBA 9mm cables, Borla tip, IAT adjuster
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CW
GenIII
5/20/2002
23:00:24
| RE: Leach PCM flash was overwritten!
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I have faith in ya Lesley. You will figure out a way to get there.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
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D
Dodge Dakota
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5/20/2002
23:02:34
| RE: Leach PCM flash was overwritten!
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Message:
Matt: how did the flash improve your
performance, before it was overwritten?
Did it raise or remove the speed limiter?
I have a 2001 and was thinking of getting it
done (after I sell this paper weight of a jet chip
on Ebay)
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kota on 20s
GenIII
5/21/2002
01:39:12
| RE: Leach PCM flash was overwritten!
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Message:
Matt, how can you drive into the dealer with the flash and drive out without it, and not know something was differant?!
does the flash suck that bad that you couldnt tell if it was there or not?
is leach charging you full price to re-flash it? if not how much?
Eric, 98 5.2 5speed, K&N gen II, 50mm TB, 2bbl M-1, 1.7RR's, JBA ciramic headers, carsound cat, dumped gibson, and a lot more
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Matt Barret
Dodge Dakota
JOIN HERE
5/21/2002
08:09:44
| RE: Leach PCM flash was overwritten!
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Message:
The flash, when I orginaly got it was about the only thing I had done to the truck (other than the Flowmaster cat back) so the gain from the PCM was only about 5-10 hp. It also removes the speed limiter, and increased the rev limiter to 6500 rpms. The fuel curve is increased 5%, and timing is set to 28.5 degrees adv.
So to answer the question, its hard to feel 5-10 HP in seat of the pants. My truck was at the dealer for about 3 days, while I drove an old F-150 around. So when I jumped back in the truck it felt fast as hell to me! After that point I did'nt think anything of it. My ET's were still improving as I was learning how to launch with the slicks. I had no reason to believe, and did realize the dealer could overwrite it.
The Leach PCM flash goes hand in hand with the other mods I have done sicne then. The 72 mm TB, the 3rd cat being removed, air intake, and now the HO cams, and HO intake.. I think its safe to say the net increase from the Leach programming will be much more than before!!
Leach is not charging me to replace!
Matt
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B1llyw
GenIII
5/21/2002
08:53:10
| RE: Leach PCM flash was overwritten!
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Message:
I wish Mike Leach, Inc. had a flash for 2001 and up trucks. You talk to a lot of people and some know what they're doing and others seem like they're pretending. I think the Mike Leach guys really know their sh*t.
Bill White - 2002 QC 4x4, SLT , 4.7, 5 spd, 3.92's w/LSD, Airaid, MBRP Super Single, Hurst T-Handle, BFG A/T's, IAS Shocks, 180 T-Stat, Jet Chip - Stage II
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alex
Dodge Dakota
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5/21/2002
09:38:54
| RE: Leach PCM flash was overwritten!
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They really do know their poop, but the manufacturers are onto tuners like them. They are writing the base software and programs so that they cannot be penetrated by anyone except the dealer and he's only allowed to do one of those f-ed up "Factory Authorized" updates. Guess what year that all started?? 2001. Oh well. Maybe, over time, someone will find a way in.
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Duner
Dodge Dakota
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5/21/2002
11:42:31
| That really sucks!
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I was always worried about that with mine. I think I would have noticed my lost rev capabilities right away because I'm always taking this thing to 6000+ rpms! hahaha I have a stock PCM I put in this when I am towing and it really makes my truck feel like a slug in comparison. Just think..... you might have been into the 13's!
I can't wait to hear how the renewing of the PCM changes everything for you..... especially now that you have all of those mods!
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Matt Barret
Dodge Dakota
JOIN HERE
5/21/2002
11:52:15
| RE: Leach PCM flash was overwritten!
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Message:
Yes Sir Duner... just think, the truck went 14.2's many, many times with only a Flowmaster Cat back, a home made air intake, some slicks and a ported 65mm TB !! he hee, If that ain't enough to see those Pushrod boys cry, I don't know what is? LOL
Matt Y2K-HEMI
'00 RC 4.7L 5spd 3.92 LSD
14.23 @ 94.49
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Dallas
Dodge Dakota
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6/22/2002
15:11:16
|  RE: Leach PCM flash was overwritten!
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Message:
I have read that the PCM flash can cause problems when towing. I tow a motorcycle trailer with three bikes and usually one in the bed. what problems does the flash cause? and why? is there anyway around this besides not getting the flash?
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crm
Dodge Dakota
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6/22/2002
19:50:38
| RE: Leach PCM flash was overwritten!
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Message:
matt, i read you recently gutted your 3rd cat. could you verify for me that there were no O2 sensors behind it?
i am starting to think that i dont need the OBD-II compliant cat that one guy told me i had to have. if there is no sensor, i cant think of any reason not to just replace it with a cheap Catco instead of a more expensive one...
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Bruce P
Dodge Dakota
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6/22/2002
20:05:15
| RE: Leach PCM flash was overwritten!
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There are NO O2 sensors after the 3rd cat.
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crm
Dodge Dakota
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6/22/2002
23:11:17
| RE: Leach PCM flash was overwritten!
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Message:
excellent!
/me eagerly awaits monday morning to set an appt with his exhaust guy
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Clevite 77
Dodge Dakota
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6/23/2002
00:27:16
| RE: Leach PCM flash was overwritten!
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hey crm,
I had my 3rd cat removed and replaced with a pipe, then a month went by, and for warranty reasons I put the cat back on (but I gutted it first.)
It's a lot quieter now and I lost a little top end, If your going to just gut it I recommend putting a pipe through it so the flow isn't baffled as much.
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crm
Dodge Dakota
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6/23/2002
17:40:46
| RE: Leach PCM flash was overwritten!
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well, i dont plan on gutting it. i still wanna be able to pass emissions here in Dallas County. i was hoping to just get a cheap Catco. one of the exhaust places i talked to before said something about needing an OBD-II compliant cat and that it would cost more. but if there is no sensor, i dont see how it would matter that much. so now i will be able to get the cheaper Catco universal fit.
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Demon Dakota
DakotaEnthusiast
6/24/2002
10:16:42
| RE: Leach PCM flash was overwritten!
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Message:
Removing the third cat DOES NOT VOID THE FACTORY WARRANTY!!!!!!!!!!! Why in the hell don't you folks ever read what I write on this board. I've already won several battles with several dealers over the years on this very type of thing. Passing emmisions is one thing, but NO WARRANTY VOID! If they try to tell you otherwise, tell them to research US Title 15 Chapter 50. Then tell them to go blow a goat...
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ZenDak
Dodge Dakota
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6/24/2002
10:41:48
| RE: Leach PCM flash was overwritten!
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I think Speedtweaks should offer State Inspections!!! That would be sweet.
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crm
Dodge Dakota
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6/24/2002
11:00:44
| RE: Leach PCM flash was overwritten!
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the only thing with them offering inspections would be that Texas only allows you to inspect a vehicle registered in the same county.
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conig
Dodge Dakota
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6/24/2002
13:57:13
| RE: Leach PCM flash was overwritten!
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Matt Barrett, you need to try gutting out your precats if you can get away with it(emissions) this should get you a good gain considering the restriction is closer to the manifold. And it would be cheap id you rolled your own cat box.
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Matt Barret
Dodge Dakota
JOIN HERE
6/24/2002
14:28:45
| RE: Leach PCM flash was overwritten!
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Conig, The thought has crossed my mind. I have 4 o2 sensors. I guess I'd need 4 cat boxes? I'd also need a custom y-pipe. It'd be very tough to weld in a pipe in place of the mini cats and keep the geometery of the y-pipe correct. You'd almost need to fab a jig for it. Another solution would be to order a Federal y-pipe with out the mini cats? The bottom line is could be done. I don't think I'm going to try it at this point. My HP numbers are pretty much in line with what folks who don't have the mini cats have, which leaves me to believe they are not that restrictive (just my opinion)
-Matt
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CW
GenIII
6/24/2002
14:33:31
| RE: Leach PCM flash was overwritten!
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You just need a dual cat box for the downstream O2 sensors. Leave the upstream ones where they are or you will really have problems.
2001 4.7HO RC 5sp 3.92 LSD
Click on thumbnail for mods.
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conig
Dodge Dakota
JOIN HERE
6/24/2002
14:51:22
| RE: Leach PCM flash was overwritten!
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you could gut em instead of replacing them. plus you don't need to spend the money on a catbox. a 650k resistor on the signal wire on the second o2's and a 1mfg cap across the signalwire and the reference wire. like this O2 --###--- pcm
l
###= 650k $$
$$= 1 mfg cap l
--------
It's a rough scetch but you get the genneral idea I' m going on 4 months since I built mine and it still works like a charm, and it was only $2.12 in parts from radioshack.
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conig
Dodge Dakota
JOIN HERE
6/24/2002
15:03:05
| RE: Leach PCM flash was overwritten!
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Message:
ok that didn't post as planned.
----###---- pcm
l
$$
l
-------------
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