1994 Pontiac Grand Prix Pontiac gran prix running fine one

MIKEY821

MEMBER
1994 PONTIAC GRAND PRIX
6 CYL
FWD
AUTOMATIC
131,000 MILES

I have a 1994 Pont, Grand prix my wife parked it the other day and would'nt start a few hours later. Rattling noise coming from the right side of engine charged battery, checked for spark, checked for gas, runs like crap. Plugged code reader in the port nothing just serice engine with battery symbol koeo. Service engine light goes out when started missing terribly. Timing chain jumped a tooth?Ecm malfunction?Crank position sensor?Any help would be appreciated guys Thanks mike.

5 Replies

MASTERTECHTIM

MECHANIC
4,750 POSTS

Can you give me the eighth letter of the vin number so I know the exact engine we are talking about. This will help me help you.

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Tuesday, March 4th, 2008 AT 10:40 AM

MIKEY821

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3 POSTS

Sorry guys its a 3100 m code v6

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Tuesday, March 4th, 2008 AT 10:48 AM

MASTERTECHTIM

MECHANIC
4,750 POSTS

If it runs at all. Not crank sensor, definately not timing chain. First most common thing is the plug wires will rot on the ignition coil towers. One at a time remove plug wires from the coil and I bet you will find some real messed up. Get back to me.

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Tuesday, March 4th, 2008 AT 10:57 AM

MIKEY821

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3 POSTS

Guys I checked all the fuses and they were ok.I also
checed the coils they are firing but one has alittle corosion on it. I still can't get any codes from the computer check engine light steady and battery light on checked battery voltage its at 12.96v whats next?

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Friday, March 7th, 2008 AT 11:44 AM

MASTERTECHTIM

MECHANIC
4,750 POSTS

Battery voltage at 12.96 running is not enough, it should be 14.2v. If running only 12 then you need to replace the alternator, and that could also be causing your noise in engine. Get back to us