illjill Posted June 18, 2009 Report Share Posted June 18, 2009 It just started doing this recentaly but usually..it seems when I have my car sitting in the sun for a couple hours its will take like a couple seconds of cranking until the motor turns over. But then..when it sits all night, like when I go to work in the morning you just turn the key and go. I dont hear the fuel pump prime when the key is in the on position... :character0292: . The pump is the OE replacement which is only a little over a year old...any ideas on whats going on? thanks guys Link to comment Share on other sites More sharing options...
mikec Posted June 18, 2009 Report Share Posted June 18, 2009 I dont hear the fuel pump prime when the key is in the on position... Common misconception for StarQuests: the pump does NOT run when the key is moved to ON. It only runs when the key is in the START position; then once the engine runs the ECU keeps the pump running. That's why you don't hear anything turning the key ON. Fuel pressure is supposed to be trapped in the lines by closed injectors and a check valve at the pump outlet when you shut the engine off... that trapped pressure is the "prime" next time you try to start. Injectors that slowly leak can flood the engine, leading to hard starting. But let the leak go for many hours... the gas eventually evaporates and the engine starts normally. How long does it "sit in the sun" and have the hard starting problem? Let it sit in the sun for 8+ hours and see if the problem persists. mike c. Link to comment Share on other sites More sharing options...
Edde Posted June 18, 2009 Report Share Posted June 18, 2009 If it's flooding like Mike describes you may see a decent puff of fuel smoke when it finally does fire up. Link to comment Share on other sites More sharing options...
JSwan Posted June 18, 2009 Report Share Posted June 18, 2009 Mine did it on engine warm starts, not hot or cold starts. I took off the OVCP after running the car to temp and could look into the TB and see the fuel drip out of the injectors after i shut the car off. Link to comment Share on other sites More sharing options...
illjill Posted July 20, 2009 Author Report Share Posted July 20, 2009 (edited) yeah it always does it when it sits in the sun for a couple hours..and yes there is a puff of smoke when it first starts up but after a few seconds it clears out. so my injectors are leaking then? Edited July 20, 2009 by illjill Link to comment Share on other sites More sharing options...
eviper21 Posted July 20, 2009 Report Share Posted July 20, 2009 hard starting, puff of smoke....id say yes..and bet money on it too. mine did the saaaaame thing its probably only the primary too....id say take em off and pressure test them with a compressor before you go out and buy 2...unless you have the money n want the extra reassurance and/or the secondary is bad to. Link to comment Share on other sites More sharing options...
illjill Posted July 20, 2009 Author Report Share Posted July 20, 2009 yeah, alright I'll test them fools then! thanks alot!! Link to comment Share on other sites More sharing options...
vbrad511 Posted July 20, 2009 Report Share Posted July 20, 2009 Do not use a compressor to blow air into/through your injectors. If you can do without your car few a week send them off to be professionally tested and cleaned. RC Engineering, or Withchunter, both do a great job. If you've gotta try something yourself do this... http://starquest.i-x.net/viewtopic.php?t=9...850fb236290938b Link to comment Share on other sites More sharing options...
Recommended Posts