So i just bought a 95 Eclipse RS last week and im having a few small problems. I hope small. Once the car warms up it has what sounds like a miss. I changed the plugs, wires, and coil and still no help. I had one code which was a speed sensor i believe. Car drives pretty good most of the time. Sometimes it has a slight jerking while cruising around. Might have to take it to a mechanic soon. Any thoughts would be helpful.

Any modifications? Pull the OBDII trouble codes, cross reference them at http://www.obd-codes.com/trouble_codes/, and let us know so we can give you some suggestions.

Also, any modifications to the car?

How many miles? Prior maintenance?

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2012 2500HD LML

The car has 170000 miles on it. Guy i bought it from said the motor was rebuilt at 130000 miles. One cylinder was scarred so they bored it .020 i believe and replaced all piston, rings, rods, rod bearings. The head had all the valves and seals replaced. I took it to oreillys and the only code it pulled was a speed sensor. I dont know if that would cause the motor to miss. The guy from oreillys did say that it sounds more like a lope, he thought it could be bad gas. I did just take the exhaust manifold cover off and noticed it has a few cracks in it also.

I'll be honest, it kinda sounds like the first signs of a dying ECU. I would suggest checking the resistance on the ignition coil and pulling the plugs to see if they're good first.

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

I did change the plugs. I will check them again when i get home. I dont have a multimeter to check the resistance. Is there a better aftermarket ecu that i can swap with? I think im going to take it to a mechanic tomorrow and see if they can check it out.

This could be a fuel problem as well, have the fuel pressure checked, it should be around 50psi, next I would do is take out the valves, clean them with throttle body cleaner and blow them out with compressed air. See if that helps, I had this problem with mine, it started off slow, I'd clean them and it became more frequent, it ended up being a rotted out filler tube.

Give the fuel pressure a try and then the injectors. And yes their is an aftermarket ecu. I can't remember the exact name of it, but i don't know exactly what it does or if it's even legit


Edit, I'm pretty sure it's Howell automotive af/x or something like that

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

I have a 95 auto trans ecu sitting around.

97 RS blown engine

Ok so now i its getting worse. I took it around the block yesterday and it killed on me at a stop. I had to give it gas to keep it idling. So when i took off from the stop my car started jerking hard around 3500 rpm. 1st 2nd and 3rd gear. When i pulled up in my driveway it went back to idling rough again but didnt kill. I did notice that the screw that holds the plug in the ecu is broke and i cant screw the plug in. Is it possible to upload a video so i can show what its doing?

Youtube.

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2012 2500HD LML

so i finally found out what is wrong. i took the throttle body off and cleaned it, and cleaned the IAC. so today i replaced the IAC and camshaft pos sensor and it threw a code. well the code was for timing belt jumped a tooth or more. so now it looks like i have to take it to a mechanic and have it worked on. thank all of you for your help.

Much appreciated!