| From | Message |
Need4Speed
Dodge Dakota
JOIN HERE
10/12/2005
08:27:36
|
 Subject: Spark Knock
IP: Logged
Message:
I got a problem.... I got the Mopar perf. PCM for my truck yesterday, installed it, and was AMAZED with the performance increase.... BUT, when the truck shifts at WOT I get a horrible spark knock. I am running 93 octane fuel, so I doubt if that is the problem. I also installed an Accel super coil when I installed the computer. So, I dont know if it is the coil, or if I am going to have to drop down to a 180
t-stat to solve the problem, or if there is something else wrong (already did a tune up on the engine: plugs, wires, cap, rotor). Anybody got any ideas?
'94 Dak, 5.2, auto, K&N, clean cat, thrush exhaust, electric fan, Autolite Platinum plugs, Accel Super Coil, Moper perf. PCM
|
daddio
Dodge Dakota
JOIN HERE
10/12/2005
09:04:49
|  RE: Spark Knock
IP: Logged
Message:
try running some Seafoam through the TB to clean the combustion chambers. carbon build up will promote pre-detonation because the carbon will make the chamber hold more heat.
|
Need4Speed
Dodge Dakota
JOIN HERE
10/12/2005
13:18:21
| RE: Spark Knock
IP: Logged
Message:
Thanks... I picked up some sea-foam today and am going to try that right now. I also got the 180
t-stat just for good measure. Like I said, the computer is very impressive, just need to get it running so I'm not destroying my engine!
|
DanK
Dodge Dakota
JOIN HERE
10/12/2005
14:09:21
| RE: Spark Knock
IP: Logged
Message:
Or change to the next cooler range spark plug.
|
Anderson
Dodge Dakota
JOIN HERE
10/12/2005
16:51:54
|  RE: Spark Knock
IP: Logged
Message:
I have a '98 Dakota with a 318 and spark knock was a big problem. I found a steel plenum plate bolted under the intake with the gasket sucked in.Causing a serious lean issue.Replaced the gasket with a Felpro,which had a metal core for strength and I can run 89 octane pulling a 25 foot trailer now.Found out this was common with original gaskets. Hope this helps.
|
Need4Speed
Dodge Dakota
JOIN HERE
10/12/2005
18:01:57
| RE: Spark Knock
IP: Logged
Message:
Well, just got back from another short trip with the new PCM... WHAT A DIFFERENCE! I put the sea-foam thru the intake as per the instructions, then followed that up with some Throttle body spray cleaner... but I had to stop because I was generating some sort of blue toxic plume that was drifting into my neighbors yard. I will find a remote location and finish cleaning the intake. I had my Tech buddy check for a leaky intake gasket, and he said that it is fine, and I think the 180 t-stat will take care of my knock. I had my doubts about the Mopar PCM (from past experiences with performance chips), but it was definately worth the money! The truck even sounds different under a load, and I can hardly keep the wheels from spinning off the line. I will update once I have the new t-stat installed and I take it for a run out on the interstate, should be fun! Thanks again for all the info!
-Matt
'94 Dak, 5.2, A/T, K&N, open cat, thrush exhaust, Autolite Platinum 3924's, Accel super coil, Mopar Perf. PCM, electric fan
|
galyion
Dodge Dakota
JOIN HERE
10/12/2005
19:13:25
| RE: Spark Knock
IP: Logged
Message:
i have a 93 dakota w/ 5.2 i put the mopar pcm in and had the spark knock problem i did like u did and cleaned the intake. that seamed to help for a while but i found the main prob was the gas. use a quality fuel from a good gas station. not a little mom and pop place. since then i put the mp1 and a msd w/ timing control in. now i run 87 or whatever if a hear a little knock i just retard the timing a degree or two. the thermostat would probaly help too. i put a 180 in at the same time.
|
dartvader
Dodge Dakota
JOIN HERE
10/14/2005
19:50:17
| RE: Spark Knock
IP: Logged
Message:
I had that problem too when I got my B&G flash,but I had a cracked cylinder head at the same time so when I replaced the heads and installed new valve springs the pinging was gone
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
