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94 900S bucking; engine hesitates (long)
Posted by Dave (more from Dave) on Wed, 30 May 2001 17:25:00
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I have read several posts on this board of similar problems and want to throw out my own situation for evaluation. Veh is a 94 Saab 900S non-turbo 110K miles manual trans. First incident occured 2 weeks ago while driving under unusually warm, humid conditions. Thought it was vapor lock. Bucked at low speed, but did not stall. I let it sit for 15 mins and it then ran fine until ten days later when I was driving in the warm,dry San Joaquin Valley. Once bucking started, if I turned the car off and rest for a few mins, I was good for about another 30 of good driving. Turning on the a/c increased chances of bucking; turning on the heater seemed to delay the incident. Car would always restart and idle normally. Engine temp gauge was well in the normal range. Seems to be a heat sensitive issue. I think I can rule vapor lock out, but what about a bad fuel pump relay switch? Could this be from dirty fuel injectors? All comments appreciated.
Dave
Fremont, Calif. <--- stage one power alert today....
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