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HELP.......got a stumble or a miss #1461373 12/15/05 02:38 PM
Joined: Oct 2001 Posts: 236 Layton, Utah P Pinebox_dup1 OP CEG\'er
OP Pinebox_dup1 CEG\'er P Joined: Oct 2001 Posts: 236 Layton, Utah	I know this is a Contour forum, but I'm looking for any help I can get. I've scratch my head raw trying to figure this out. So, let's see if I can really describe this. Here's a list of what I've noticed when it does it.... -First off, it's not consistant. It only does it now and then. -There were a lot of things that happened just before it started. I changed to big FMIC, it got cold outside, and I tried several tanks of Conoco gas (when premium was $3+/gallon). All previous gas has been from Chevron. -Anything over 10psi of boost. But I can only feel it do it once or twice if I bring it over 12lbs of boost at WOT. -Starting from a light or a stop. But only if the RPM's are below 1500. -When cruising and I need to accelerate to pass (or whatever) and I apply about 1/2 to 2/3 throttle, boost is about 8-12psi depending on which gear I'm in. It will do it once or twice. Ok, I think that's about it. But if i think if anything else, I'll add it. For reference, here are the power mod's I've done.... MOPAR Stage 1 (boost spikes @ 14psi and holds 12psi at redline when it's cold, warmer weather it's 18psi and holds 15-16psi) Short ram intake Cat back exhaust MSD coil pack w/8.5mm wires I've replaced the plugs w/ OEM gapped at .040" The last full tank of Conoco gas got a bottle of 104+ Octane booster, thinking maybe bad gas. Since then I've switched back to Chevron. Which has helped a little. I'm gonna try changing the plug gap down to .035" tonight and see if that does anything. Plus I'm gonna switch back to the OEM coil pack/wires. Then back to the stock ECU and if that doesn't do it, off to the dealer it goes. Anyone have any ideas? Tell me it's bad plugs, bad wires, bad coil pack, bad fuel filter, anything. TIA!! Dave, '04 E. Blue Dodge SRT-4 ...with some go fast stuff...going for 20+psi (273 whp & 311 lb-ft with a boost leak) '03 Kawasaki ZX-6R 636

Re: HELP.......got a stumble or a miss #1461374 12/15/05 06:49 PM
Joined: Jun 2001 Posts: 4,777 Cobra Heaven H Horse_dup1 Hard-core CEG\'er
Horse_dup1 Hard-core CEG\'er H Joined: Jun 2001 Posts: 4,777 Cobra Heaven	one thing you might check where is your intake temp sensor? If the engine is reading too cold of a charge it may try to compinsate and your feeling its efforts? (welcome to my world BTW - I still have the miss that this car has had since I got it) Tea 82 242Ti Proud former owner - Samantha '98 SVT #2253 Reborn Aug 21 2002 Cobra Paradise

Re: HELP.......got a stumble or a miss #1461375 12/15/05 07:20 PM
Joined: Oct 2001 Posts: 236 Layton, Utah P Pinebox_dup1 OP CEG\'er
OP Pinebox_dup1 CEG\'er P Joined: Oct 2001 Posts: 236 Layton, Utah	Originally posted by Horse: one thing you might check where is your intake temp sensor? it's on the intake before the turbo Dave, '04 E. Blue Dodge SRT-4 ...with some go fast stuff...going for 20+psi (273 whp & 311 lb-ft with a boost leak) '03 Kawasaki ZX-6R 636

Re: HELP.......got a stumble or a miss #1461376 12/15/05 07:42 PM
Joined: Jun 2001 Posts: 4,777 Cobra Heaven H Horse_dup1 Hard-core CEG\'er
Horse_dup1 Hard-core CEG\'er H Joined: Jun 2001 Posts: 4,777 Cobra Heaven	maybe by the time you have tripple cold air running into the intake its too cold for the computer to compinsate for? Tea 82 242Ti Proud former owner - Samantha '98 SVT #2253 Reborn Aug 21 2002 Cobra Paradise

Re: HELP.......got a stumble or a miss #1461377 12/15/05 07:59 PM
Joined: Oct 2001 Posts: 236 Layton, Utah P Pinebox_dup1 OP CEG\'er
OP Pinebox_dup1 CEG\'er P Joined: Oct 2001 Posts: 236 Layton, Utah	triple cold air? Dave, '04 E. Blue Dodge SRT-4 ...with some go fast stuff...going for 20+psi (273 whp & 311 lb-ft with a boost leak) '03 Kawasaki ZX-6R 636

Re: HELP.......got a stumble or a miss #1461378 12/16/05 12:59 AM
Joined: Aug 2003 Posts: 2,097 CO S stilov Hard-core CEG\'er
stilov Hard-core CEG\'er S Joined: Aug 2003 Posts: 2,097 CO	i heard that there was a tsb or something on the ignition 98 E0 SVT with some stuff

Re: HELP.......got a stumble or a miss #1461379 12/16/05 01:17 AM
Joined: Aug 2002 Posts: 4,970 Land of the watered-down exple... S Swazo Hard-core CEG'er
Swazo Hard-core CEG'er S Joined: Aug 2002 Posts: 4,970 Land of the watered-down exple...	Originally posted by Pinebox: Originally posted by Horse: one thing you might check where is your intake temp sensor? it's on the intake before the turbo Sounds like an ignition issue.... test out the swap to OEM stuff. As far as the IAT sensor, everything that I have read/heard says that it's best to have it after the IC and before TB to see what the engine is actually going to see. Did the actual location change once you switched to a larger IC? 2005 Ford F150 SuperCab FX4 1964 Chevrolet Impala SS 1998 CSVT: 354HP/328TQ @ 10 psi, now gone

Re: HELP.......got a stumble or a miss #1461380 12/16/05 02:05 AM
Joined: Jun 2001 Posts: 4,777 Cobra Heaven H Horse_dup1 Hard-core CEG\'er
Horse_dup1 Hard-core CEG\'er H Joined: Jun 2001 Posts: 4,777 Cobra Heaven	Originally posted by Swazo: Originally posted by Pinebox: Originally posted by Horse: one thing you might check where is your intake temp sensor? it's on the intake before the turbo Sounds like an ignition issue.... test out the swap to OEM stuff. As far as the IAT sensor, everything that I have read/heard says that it's best to have it after the IC and before TB to see what the engine is actually going to see. Did the actual location change once you switched to a larger IC? yeah - what daymonsaid - also I ment that its REALLY cold outside, plus having a bigger FMIC = Tripple cold Tea 82 242Ti Proud former owner - Samantha '98 SVT #2253 Reborn Aug 21 2002 Cobra Paradise

Re: HELP.......got a stumble or a miss #1461381 12/16/05 02:16 PM
Joined: Oct 2001 Posts: 236 Layton, Utah P Pinebox_dup1 OP CEG\'er
OP Pinebox_dup1 CEG\'er P Joined: Oct 2001 Posts: 236 Layton, Utah	one step at a time..... changed my plugs and gapped them to .035.......and the verdict......problem solved, at least for now. If it starts up again, I'll swap to the OEM coil pack and wires. I don't think I'd ever guess that .005" in spark plug gap would make that much difference. :kickmeinthehead: Dave, '04 E. Blue Dodge SRT-4 ...with some go fast stuff...going for 20+psi (273 whp & 311 lb-ft with a boost leak) '03 Kawasaki ZX-6R 636

Re: HELP.......got a stumble or a miss #1461382 12/16/05 06:34 PM
Joined: Jun 2001 Posts: 4,777 Cobra Heaven H Horse_dup1 Hard-core CEG\'er
Horse_dup1 Hard-core CEG\'er H Joined: Jun 2001 Posts: 4,777 Cobra Heaven	so you went bigger or smaller gap? I havnt tried that on mine . . . Tea 82 242Ti Proud former owner - Samantha '98 SVT #2253 Reborn Aug 21 2002 Cobra Paradise

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