Question about 1988 Chevrolet Suburban

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I have a 1988 Suburban w/ a 350 and uses TBI, that has been out of commission for about six months. I recently got the old girl running after installing a new fuel pump and she goes like new with 154,000 mi on her, but after the engine warmed up where I could tell my new water thermostat was working correctly {which it was}, after a couple of rise and falls on the guage, the engines oil pressure started dropping from 30 on the guage, to 0 and then the engine died. this happened in less than 10 seconds while I was watching it. My question is: Could this be from a sudden death of the oil pump, or could something plug a supply route to the oil pump. I'm thinking about installing a new oil pump, but want some pro advise to this problem of sudden oil pressure loss. Any info would be appreciated.

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All signs point to a failed oil pump. I would also recommend since it has been sitting around to give the oil system a good flush, get all the gunk out

Posted on May 27, 2011

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Hope this helps (remember to rate and comment this answer).

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1988 5.7 TBI Nightmare This is the start of what the problem was and is, I had a RV cam installed when the engine was rebuilt a year ago. the cam was not a computer friendly cam so after a round with the rebuilder and discovering the specs weren't the correct ones for the cam I installed a 3702 edelbrock cam and lifters with a 7800 timing chain and gear set after I had tried two chips from Jet and no improved performance and the 3rd chip was to be for the cam and that is what is in the ECU now and I have tried about 5 different BCC chips and the bottom line is the power is there but something is happening its hit and miss the idle will sometimes lope, is stalled when first started and acts as if its starving for fuel or its bogged with to much fuel. the fuel pressure is 10 - 13 psi and I have R/R the TPS, IAC, ESC and knocks device , EGR and Solenoid, MAP, Temp sensor, and the Dist is a Procomp 10001 with a MSD-5526 coil. the Throttle Body was rebuild and the ECM was replaced with a Rebuilt ECM. it will smell rich etc. but with the things that goes on it does not show any codes?? I have no clue just feel stupid this is been a simple thing that is kicking my **** and now its a challenge but still loosing the fight too far in and too much spent to stop,. LOL Help !!!! The BCC is a california vehicle AFBX, 5.7TBI TH400 A/T P.S. the key can be turned of and back on as the engine not dying and seems to correct the power and run problems but will not last goes back to running bad or with problems. ?

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