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Car Forum / Pontiac / Pontiac Cars / September 2007Backfire!
1988 6000 2.5 126,900 miles Lately when I start the car in the morning, just sitting in reverse with the brake on, after a minute or so, the car will start to idle eratically. The RPMs will fluctuate and the engine will miss. The RPMs will fluctuate worse and worse until eventually the car stalls out just sitting there with the brake on. It might do it in drive also, but I've never tried that. When it stalls, it also lets out a small backfire. It's TBI. Any ideas? Thanks. Plugs and wires are only 8 months old. I'd check fuel pressure first, this assumes difficulty in restarting, which was not mentioned. > 1988 6000 > 2.5 [quoted text clipped - 7 lines] > that. When it stalls, it also lets out a small backfire. It's TBI. Any > ideas? Thanks. Plugs and wires are only 8 months old. It normally starts back up without much difficulty... > I'd check fuel pressure first, this assumes difficulty in restarting, > which was not mentioned. [quoted text clipped - 16 lines] > ----= East and West-Coast Server Farms - Total Privacy via Encryption > =---- Ok this would not be a fp problem, try scanning it and look at coolant temp sensor inputs for one ( cold), clean the throttle body, and remove the idle air control and clean that also. Again, this assume this is a cold start issue only. > It normally starts back up without much difficulty... >> I'd check fuel pressure first, this assumes difficulty in restarting, [quoted text clipped - 17 lines] >> ----= East and West-Coast Server Farms - Total Privacy via Encryption >> =---- Yes, it does appear that it only does this when the engine is cool. > Ok this would not be a fp problem, try scanning it and look at coolant > temp sensor inputs for one ( cold), clean the throttle body, and remove [quoted text clipped - 29 lines] > ----= East and West-Coast Server Farms - Total Privacy via Encryption > =---- > 1988 6000 > 2.5 [quoted text clipped - 7 lines] > stalls, it also lets out a small backfire. It's TBI. Any ideas? Thanks. > Plugs and wires are only 8 months old. Sounds to me like a MAF, IAC, or TPS problem. Check and clean all those things. Clean the throttle body, too. |
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