i just put the engine back in and was trying to get it started i have an electronic fuel pressure gauge (new-autometer) when i turn the key forward it pumps right up then goes back to zero . is this right ? on my trans am it pumps up and stays (wtf) i'm also toying with the timing !but i think there are new fueling issues ! help would be appreciated . thanks
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fuel pressure problems
- Thread starter blk97ta
- Start date
Lynn D. Brown
New member
Fuel Pump probs
Fuel Pump probs
Maybe somebody can tell us how this whole fuel system works at startup ? I assume that Ur car won't start ?
When U turn the key, it actuates the FP and U can hear it rattling. But if U just kept going into start, wouldn't the pump just keep going ? Or is there a slight pause time where the pump goes off and the check valve has to keep it pumped up ? But if U keep the start key on wouldn't the pump just start again and start the car ?
R we sure that there isn't an electrical problem that's not allowing the pump to come back on ?
Fuel Pump probs
Maybe somebody can tell us how this whole fuel system works at startup ? I assume that Ur car won't start ?
When U turn the key, it actuates the FP and U can hear it rattling. But if U just kept going into start, wouldn't the pump just keep going ? Or is there a slight pause time where the pump goes off and the check valve has to keep it pumped up ? But if U keep the start key on wouldn't the pump just start again and start the car ?
R we sure that there isn't an electrical problem that's not allowing the pump to come back on ?
the way it normally would (or should) work is you turn the key to the on position which tells the ecm to power up the drivers for the fuel pump after like 5 seconds it tells the drivers to stop (which in normal cases the fuel rail should be pressurized with 40-50 lbs pressure so when you crank it the injectors are pressurized and ready to go ( similar to pumping the gas while cranking it, on a carbed vehicle ) make sense ! my truck doesn't hold any pressure other than when it's cranking ! :-?
Lynn D. Brown
New member
Does it start ?
Lynn D. Brown said:Does it start ?
after cranking it for a while sometimes it would catch (and run like sh!t then die ) i was trying to set the timing but it wouldn't run right or long enough for me to get it in the ballpark ! don't worry the turbo to i-c hose isn't hooked up and the ultimate is set to valet (for safety reasons )