LakeSinclairGreg
Cadet
- Joined
- Feb 22, 2018
- Messages
- 13
Hi all, I'm new to the site and have a tech question. I have a 2000 Volvo 5.7 GI. The problem is when first started for the day the engine will run fine for approx. 20 minutes. Then there is a pretty violent lean pop in the intake. If I don't pull the throttle back and shut it off it will eventually shut off. If I let it sit for a few seconds it will start back up and run fine for a few more minutes and happen again. After sitting all night, the next morning I can start it up and run again for apprx. 20 minutes and here we go again. I have the diacom software and have watched all the data as it's running normally and then when my problem arises. I don't see anything out of sorts. The fuel pressure on top of the high pressure pump is 31 psi. It doesn't fluctuate when my problem arises either. I pulled the injectors out of the throttle body and had them cleaned and serviced. Did not help. I've tried running a separate fuel tank. I've replaced ignition coil, distributor pickup, cap, rotor, wires. plugs, map sensor, tps, and IAC. Nothing seems to help. Now that being said I have access to another Volvo of the same year but with a 5.0 GI. I pulled the throttle body off that one and put it on my 5.7 and it does the same thing, but the lean pop is not as violent and the engine will continue to idle without shutting off. I'm not sure if the 5.0 and 5.7 have the same injectors or not? Any thought from you guys? I'm kinda at a loss now