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#1
03-17-2008, 09:30 AM
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cylinder misfire? HELP IM LOST!
OKAY everyone. I have a 98 eclipse GS-T and I am having a misfire problem. Here we go. I have tried the following things. replaced BOTH coils packs, replaced the spark plugs, replaced the wires, replaced the ignition control module. Than began to think i may have a burnt valve so i did a compression test, 150 across the board.... blows my mind..... cylinder 1 and 4 are firing but 2 and 3 are not. like i said IT BLOWS MY MIND!!!! Any ides on what this might be? ANY HELP IS FANTASTIC!!!! DISTRAUGHT DSMer
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#2
03-17-2008, 11:09 PM
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Re: cylinder misfire? HELP IM LOST!
Wow! Wierd, 150 across the board, I would think it was head gasket torn between 2-3 leaving you with a compression leak, did you try a WET compression test? to check piston rings. If so maybe control module is bad.
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#3
03-17-2008, 11:15 PM
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Re: cylinder misfire? HELP IM LOST!
yeah? why would you think that? I have no leaks. Just no spark and the only CEL code that comes up is multiple cylinder misfire. Yes ive replaced the ignition control module.....
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#4
03-17-2008, 11:44 PM
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Re: cylinder misfire? HELP IM LOST!
you know what you should try. Swap your plugs from 1 and 4 onto 2 and 3 and see which cylinders fire. As long as your timing is zeroed and you are just idling this will not hurt your engine at all. I just want to see if the signal is getting through on your other cylinders (2,3)
Or you can just pull the plugs and see if they all spark. This will greatly narrow down the problem area. (either before coil pack or after)
__________________
FP 18g turbo e3 o2 & mani, 3" exhaust, , 7 bolt, wiseco/eagle, walbro 255hp re-wired, Aeromotive FPR, FIC 1150cc, injen intake, greddy RS, aem wideband, turbo xs mbc, act 2600 clutch sprung 6 puck, BC 272's, dsmlink v2.5, ETS FMIC, Devils Own, JMF SMIM. 18 Inch chrome rims In closet AEM Fuel Rail, SS Lines, 1997 TSI AWD Diamonds Are 4Ever 12.7 @ 107 http://i83.photobucket.com/albums/j2...y/DSC00461.jpg
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#5
03-17-2008, 11:49 PM
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Re: cylinder misfire? HELP IM LOST!
I have dont a test to see if im getting spark from the coil to the plug... nothing to 2 or 3 before the pack im not sure though quite yet! Switch plugs or wires? both are new either way.... im kinda down to the filthy few!!!
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#7
03-18-2008, 03:27 AM
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Re: cylinder misfire? HELP IM LOST!
See if you can take it somewhere to get the injector pulse checked, you may have a dead injector that's not firing.
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95 Talon TSI AWD 97 Eclipse GST 
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#8
03-18-2008, 07:51 AM
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Re: cylinder misfire? HELP IM LOST!
hm... to be honest, what would the injector have to do with spark? People when leaving your reaponses please include your reasoning... If I had money to waste I would have had it up to Mitsubishi by now!!!
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#9
03-18-2008, 02:52 PM
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Re: cylinder misfire? HELP IM LOST!
Nevermind, I didn't read the posts very well, I thought you had a misfire and couldn't tell from where, my bad.
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95 Talon TSI AWD 97 Eclipse GST
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#10
03-19-2008, 09:23 AM
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Re: cylinder misfire? HELP IM LOST!
I had the same problem with my 99 GS. I was getting so frustrated because I couldn't figure out what was causing the misfire in cylinder 1. I also thought I had good compression. But after an eternity, I sent it to the dealership who found that my compression was actually around 70. Turns out the cylinder head had to come off.
This may not be your case, but always worth another shot! How did you check the compression?
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