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Garbageman
Dodge Dakota
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7/13/2004
23:16:26
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 Subject: need help with mp computer
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I have a 95 dakota 318. I purchased a Mopar Performance computer at about 20k miles. I could feel the performance difference right away, but it always knocked under wide-open-throttle. I was using 91-92 octane gas. I put the stock computer back on because I didn't want to destroy the engine. Any one else have this problem? Any ideas how to fix? Also, the truck has been to the dealership prior for a rough idle complaint. The dealership said they adjusted the timing, but all the manuals that I have read about the truck say the timing is factory set and not adjustable. Could this affect the MP computer as well? Any help would be appreciated.
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kevin
Dodge Dakota
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7/14/2004
10:40:01
|  RE: need help with mp computer
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Try cooler plugs and smaller gap. Cheap solution?
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Ken
Dodge Dakota
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7/14/2004
10:42:05
| RE: need help with mp computer
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180 t-stat might help as well. Try running the Autolite 3923 plugs, they're a colder running plug, will help against detonation/pinging.
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Dakota52318
Dodge Dakota
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7/14/2004
13:13:13
| RE: need help with mp computer
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Most dealer's techs are idiots... it took them a year to figure out that my speed sensor was bad, cause it wasnt shiftng into OD. This was after a tranny rebuild, at thier cost. Anyway, you might want to check your intake manifold pan gasket, I never had a problem with knocking, but I did with oil consumpsion (sp?) It was a pain to do, but it fixed the problem, I had to do it anyway, I didnt want any of my boost going into the crank case, yeah know?
TJ
1992 Dakota
V8, 4X4, Long Bed
46RH, MP Comp
Vortech SCer at 6#
Crane Ignition, Custom TB
DT Headers, 4350 lbs.
14.3@96.5 Best to Date.
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b1llyw
GenII
7/14/2004
19:49:59
| RE: need help with mp computer
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180 t-stat, 3923's will help. You may have a plenum gasket leak. They are very common. Another place to look is the coolant temp sensor. If it's not working properly, that can cause a rough idle.
Bill White - KRC Performance
'95 CC 4x2 - 408, 5-speed, 8 3/4
'03 Neon R/T - No mods...yet
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Sneezer
Dodge Dakota
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7/15/2004
10:09:03
| RE: need help with mp computer
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I have a 1992. Always had pinging under WOT at higher rpms. I would say above 3500 or so. Most noticeable on highway blasts. I put the Mopar PCM in mine, and it cleared up after 2 tanks or so. I also replaced the intake with an M1 following a severely blown intake gasket. Had so much oil inside my intake I thought I had my own refinery. Also replaced the plugs with Autolite 3923, gapped to .035. K&N Filtercharger, removed the weather guard blocking the air intake snorkel and relocated the IAT sensor to the intake tube. Truck runs like a top now, no pinging even at max rpm of 5500 or so. Also had the 180 t-stat.
Take your airfilter off, open your throttle body valves and look inside with a flashlight. If you have an oily film inside you have a blown gasket, which will cause pinging regardless of octane or PCM. If that is the case you have 3 choices:
1) Replace the gasket - cheapest but it will fail again. Design flaw.
2) Purchase a billet pan kit that eliminates the belly pan gasket. Solves that problem, cost is around $100 for the pan plus new gaskets.
3) Purchase a Mopar M1 intake. This eliminates the belly pan as well and gives you a little more power, especially at higher rpms. Also looks better. Cost with installation kit and gaskets will be $425-500.
I did the M1, it worked well for me. When I first put it on it did feel like I lost a little on the low end, but the high end rush really made up for it. Highway onramps are a blast now. Also has a really satisfying intake roar under WOT as well. The M1 also makes it much easier to work around. You can actually see the distributor and get your hand around it.
I did all these mods within 1-2 months of each other. K&N->PCM->M1->IAT relocate->Autolite 3923. I have always had the 180 t-stat.
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Garbageman
Dodge Dakota
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7/16/2004
22:21:29
| RE: need help with mp computer
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Thanks Fellas. I already have the 180 thermostat installed and, ironically, the intake manifold has been replaced. Oil consumption is still a problem though so I will examine the M-1 option. By the way, my truck is a...
95 4x2 reg cab; 5-speed
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