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94 Grand Am Is Sluggish and Smokes.

6 messages,  Last post on May 18, 2008 at 9:26 PM

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What is this discussion about? Pontiac Grand Am, Engine, Sedan

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#5 of 6 Re: 1993 grand am 3300 motor [harley192001] by kokola Apr 24, 2008 (4:06 pm)
Replying to: harley192001 (Apr 24, 2008 8:44 am) Yeah I no longer have my grand am but I would try replacing the coil packs. That's what I did and my car ran great afterwards(it had the same symptoms as yours).
#6 of 6 94 grand am dtc 13 won't go away by bison2 May 18, 2008 (9:26 pm)
hi folks, i am a newby here, I hope you can help me out diagnosing a problem with my doughters 94 grand am. Quad 4 SOHC 2.3 ltr /AT/AC.   problem is a dtc 13 [ 02 sensor ] that whatever i do keeps recurring.   i ended up replacing the ecm, map sensor, oilpressure sensor ,tps.temp sensor, i checked vapor canister and valve vacuum hoses, tested fuel pressure with engine off 39 psi and running 42 psi .fuel regulator works fine. No leaking injectors found. replaced sparkplugs and boots ,coil packs. I checked pcm wiring to 02 sensor[ replaced O2 S 4 times]. Before replacing coil packs I took the car to the dealer who figured after telling him all i did to it, that the 02 sensor was at fault and put in a new one again at a cost of 289 bucks including scanning and labor. Ses light was on again within 25 mls. I had told him O2 sensor was NOT the problem. After replacing coil packs the DTC went away for 4 days then came on again and is intermittend now. Fuel pump was replaced 10k ago, intermitted seslight on and dtc 13 was present before that.   the engine was rebuild 35 k ago by myself and ran fine for 20 k till problem started. other simptoms are at times start and stall a few times and stumbling while on the highway ,but most times runs perfect with lots of get go. I should maby test a few more items but I have no tools for that.   I am at wits end and cant afford to put more money in it, at least no dealer time at 110 pop an hour.   What did i miss here, Any idea folks   Thanks up front ,Bison2

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