cylinder 1 randomly stops working

[DSMjrv]

i just had a new 6 bolt put in my 95 gst and the guys test drove it and it ran fine... then when i went to go pick it up, about 2 blocks driving away from the shop the cel comes on and the car starts to bog pretty badly... so i drive it back and they see that the #1 cylinder stopped firing... so he turns off the car and checks it for cel's.... nothing.... turns the car back on and it runs fine... i take the guy on a 30 min drive with me and it runs perfect...

so i drove another 200 miles that day and still the car is running sweet....

but this morning while i was cruizing the cel came on again and started boging so i turned the car off real quick and right back on and it didnt bog anymore... but the cel was still on... then about 3 min later it starts bogging again...

so after driving it a while i figured out that it only bogs when i maintain a speed with minimal throttle... if im constantly giving it 60% or more throttle it wont bog... and if im coasting a 0% throttle it wont bog either... only when cruizing...

so anyways i pulled the ground wire and reset the ecu... now the cel isnt on anymore... but it might come back... we'll see

what could cause this?

 

[Old Mitsu Tech]

We need to know the code that is associated with the cel. 4g63 engines use 2 coils and although I've never seen one lose fire to one side and not the other I guess it is possible as I've seen it on GM vehicles. They use a loss fire method which means as one cylinder is firing on the compression stroke, the other one is firing into a cylinder on exhaust stroke. Bogging and cutting out are 2 different terms. If it's really bogging then I doubt spark is involved. This is usually a fuel or exhaust thing. Cutting out and losing fire is associated with shaking and missing. Let me know a little more and I'll try to help

 

[Ultimatedsm]

Ohhh I know your problem man. You said you did a 6 bolt swap in your 2g? That in the infamous random misfire and your car runs on 3 cylinders for a period of time. It usually goes away at idle or when your at a stop that comes back while your coasting. Your ECU detects for misfires while your coasting and it finds them because the 1G CAS (91-92) isn't sufficent enough to supply the 2g ECU with data or not fast enough. If you had a 94 CAS which is the HALL EFFECT, it has the same technology as your 2g DSM. That would most likely cure your misfire. However, the better route is to buy a DSMLINK and there is an option to inverse your CAM signal. Those are the two things that can cure your misfire.

Read up on the CAS's here:

http://www.roadraceengineering.com/1gcasin2g.htm

Here is another method of getting rid of that misfire you get with a 6 bolt in a 2g, but I haven't seen anyone do this or heard of anybody. Maybe people have:

http://www.magnusmotorsports.com/article_1g2g.htm

I had the same problem because I have a 6 bolt in a 95, I just bought a DSMLINK and problem solved.

 

[DSMjrv]

okay after i reset the ecu the cel never came back on.. drove it probably 50 miles yesterday... maybe it will come on today, or maybe it wont... but why would it do that anyways?

 

[Ultimatedsm]

At the time of this writing the most common glitch is an increase in CEL's. The most likely CEL to occur is "Random Misfire" Possible problem sources for phantom misfires are intermittent electrical connections and/or noise in an unshielded wiring harness, harmonic vibrations in the timing belt system, or a bad CAS. OBD-II 2G ECU's were designed to detect misfires from a sensor reading directly from the crank. A simulated crank signal from the CAS may not be accurate enough for some ECU's.

Thats a write up on a 1g in a 2g swap. CAS isn't advanced enough for the 2g ECU's. However the 94 CAS BLACK LID Hall effect is.

I recommend getting a DSMLINK