3.4 hard to start
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3.4 hard to start
After many months of chasing a flashing CEL only during highway driving, I replaced my timing belt and foung the crank gear to be loose. Before doing the timing belt, my truck started consistantly. I have always thought it took a little longer to start than it should. Now that I have the new belt on, it seems to take longer to start, sometimes 3 to 4 seconds of turning over. The thing is, sometimes it starts with a touch of the starter. The guys at Toyota have no idea, but agree that it seems a little stubborn. Any ideas?
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I have no codes now. I did have misfire codes before the belt change. The crank bolt wasn't torqued properly which allowed my crank gear and woodruff key to get trashed. The timing was going berzerk. I installed a new crank gear, belt and water pump. Runs perfectly now, but starting problem remains and inconsistant. I have pulled the timing cover to verify everything still in time. I found some old posts about fuel pressure leak down. I think I'll look into this.
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I have no codes now. I did have misfire codes before the belt change. The crank bolt wasn't torqued properly which allowed my crank gear and woodruff key to get trashed. The timing was going berzerk. I installed a new crank gear, belt and water pump. Runs perfectly now, but starting problem remains and inconsistant. I have pulled the timing cover to verify everything still in time. I found some old posts about fuel pressure leak down. I think I'll look into this.
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I wish these had a valve to connect a pressure gauge. The hardest part is determining whether the pressure leak down is the regulator or the check valve in the pump. I am going to try cycling the switch before the next few startups to see if my problem lies with fuel pressure. I understand the pump only runs for 2 seconds with ignition on and cycling is the only way to build pressure.
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sorry to be dense but following along-
your theory is that fuel delivery is inconsistent then?
if so- then is it not simple enough to install inline some type of gauge or ?
then watch it a few tries-say over a few days and various temperatures
does not seem to me you are questioning spark,
the starter cranks repeatedly and then finally catches is what I think you are describing.
your theory is that fuel delivery is inconsistent then?
if so- then is it not simple enough to install inline some type of gauge or ?
then watch it a few tries-say over a few days and various temperatures
does not seem to me you are questioning spark,
the starter cranks repeatedly and then finally catches is what I think you are describing.
#11
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The engine turns over very well. It just isn't starting up. I have new coils,plugs,wires,TPS,O2 sensor and have cleaned MAF sensor. I would suspect electrical if not for everything being replaced already. I am suspect of fuel delivery. The starter engages immediately and turns the engine over strongly. I will probably find a way to hook up a fuel pressure gauge and check for leak down.
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