starting engine problem- 1997 volvo penta tbi

[Johnsonkn20]

I am having starting issues. My engine is a 1997 Volvo Penta 5.7L TBI. I can unplug the ect sensor and the engine will crank up as soon as you turn the key, but with the sensor plugged in I have to keeping cranking to try to get it started. I have replaced the ect sensor, but didn't fix the issue. I recently (couple week ago) replaced the low pressure fuel cell, because the old one had gotten weak. I will say with the sensor plugged in, on a cold start the engine will fire up, but as the rpm's come down to idle it will shut off. When I try to start it again it just want to crank. Any ideas??

Thanks,

 

[Jammer864]

If you hold the throttle wide open when you crank it, will it start then? If so, the computer thinks the engine is at a temp that its not and adjusts the fuel inappropriatly for the start temp. If its a new ECT, check the lines between it and the computer, as well as the grounds.

 

[alldodge]

Might be that your ECT sensor is drawing to much power (a bit shorted out) and will not allow the voltage to come up to levels needed to start. Connect a voltmeter on the hot side without it connected and compare to with it connected

 

[Johnsonkn20]

Problem solved!!!
It was the high pressure fuel pump.