my 94 always takes 5 or more seconds to start in the morning, or after it has been sitting a while, and then after it has recently started or been on, it starts right up.
am i right in thinking that this is probably something with the fuel pressure relay? i know it's only 10 bucks, but i don't want to replace it if probably doesn't need replacing. if not, what else would be causing the problem? faulty fuel pump? the fuel filter is only a couple months old.
thanks, john
Mine does the same thing. it takes a few seconds of cranking for it to start, unlike a warm start where its almost instantaneous. Been doing it for a few years.
Idle is fine, acceleration right afterwards is fine. fuel pump runs a few seconds when the key is first turned. In fact I usually wait until the pump stops before starting.
I just figured the injectors were leaking, depressurizing the fuel system and that it took a while to get it pressurized again. But then again, letting the pump run before starting should cure that, but it doesnt. Maybe all that leaked fuel is pushed into the cylinders when cranked and the engine momentarily floods. Just guessing here.
I'd be interested in the answer. Its just a minor irritant though.
dicko
My 92 is sensitive to some brands of fuel. Certain brands will make me take two tries at starting, others will consistently start on the first try. I have always figured gas is gas, but over the years this phenomenon has been consistent. Every so often, after doing some maintenance procedure or other, change plugs, replace filters, clean MAF, replace gaskets, etc. I try the old stuff that didn't work well and find it still doesn't. This on a 92, 152k miles, pingless suv. You might experiment. Charlie
definitely not the IAC. i just replaced it, and after resetting the KAM, all my previous problems (rough idle, hesitation, stalling at worst) went away. the only problem that is still here is a long cranking time after it's been sitting awhile.
john
hmm, i never considered that it could be the gas i'm using. i regularly use
2 different brands (marathon and mobil), and occasionally a different one depending where i am. could better octanes or better brands really help?john
yup, you got it. absolutely identical description. hopefully someone can help us out.
john
In the past, I have seen cold starts affected by carbon build up on the back side of the intake valves. As the motor thermocycles back to cold, the carbon "dries out". When we next start it up, the initial fuel supplied by the injectors is soaked up by the now dry carbon deposits leaving the mixture much too lean for a cold engine.
GM Top Engine Cleaner is a good product for this..... just dip the end of a small vacuum hose into the product and let the intake manifold vacuum do the work. A poor connection in the ignition primary circuit can also give similar concerns..... any extra resistance in the circuit can limit coil primary current keeping a strong magnetic field from forming.
HTH.
-- Jim Warman snipped-for-privacy@telusplanet.net
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