Problem with a 94
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,682
Likes: 3
From: Coatesville PA
Problem with a 94
My first post and I got a question for anyone who can help here. I own a 94 automatic with 80,000 miles now. Just past day its been running very rough and it seems that one, possibly two cylinders are out of commision on the drivers side of the block due to it idling very rough and poping exhaust only on the drivers side. Gonna run dry gas through it tonight but anyone have past experience wether it could just be the one or two spark plugs or is it more likely the fuel injectors. Just please no one tell me its the optispark. Thanks all.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Welcome. Is the Service Engine Soon light on? Have you pulled the plugs to look at their condition?
I would start by pulling the codes in the PCM (ground terminal 4 and 12 on the ALDL under the driver side dash). Jot down what shows up on the speedo area and post it here.
I would start by pulling the codes in the PCM (ground terminal 4 and 12 on the ALDL under the driver side dash). Jot down what shows up on the speedo area and post it here.
Safety Car
Joined: Sep 2006
Posts: 3,846
Likes: 0
From: Boca Raton Inlet, Atlantic Ocean (Floridas east coast)
Remember dont hose off the engine because the optispark is not vented on a 94 (they vented them on the 96) If you must wash the engine get it hot and keep it running while you quickly hose it off to evaporate any moisture before it ruins the OS.
Thread Starter
Drifting
Joined: Feb 2008
Posts: 1,682
Likes: 3
From: Coatesville PA
Never sprayed the engine down but i know the optispark does have its problems especially earlier on. Gonna take a look at the plugs tomorrow in the day but nothin seems to mis-sparking or leaking anywhere else that i can see. Ill post later. Thanks.
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
Take your trusty paperclip and scan it for codes. A bad opti will set a code. I have to be carefull wording this so I am not the one to say bad opti. The drivers side plug wires go under the PS pump, so when you go out in the dark tonite to look for arcing/sparking wires look there very carefully. Of course you can always drip some water on the exhaust manifold to check for a cold/dead cylinder.
Hope this helps.
Hope this helps.
