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Not low enough for the low fuel light to come on. It's wierd...im not throwing any codes...i have 217k...before all this...i replaced my knock sensors and cleaned all fuel injectors and rail. It ran fine afterward...if I give it gas it runs fine??
Roger that...its been a snowball of shit happening..i was rolling down the highway Sunday evening when my cluster lit up...battery was dead...reduced engine power...over heating...got off the freeway into a bowling alley parking lot...open the hood to see my serp belt was shredded...luckily I had my tools with with me...called my wife for a quick rescue and run to autozone...took more time to unravel the shreds of belt birdnested behind the fan...finally got new serp belt on buttoned up and drove back to the house...no issues with the low idle...next morning starts and struggles to idle??
Hmmm...it was dark and i was too close to a homeless camp so I wrapped it up and bailed. I'll take a look at both though.
I started her up today and on cold motor the idle was about 500-700 rpm right off the bat...when I gunned it and let off it immediately dies. I bought this tester but not sure I have the right one to attach to the fuel rail to test fuel pressure...i pulled the vac hose and it atleast idled...but when I put back on it dies immediatley.
Assuming you’re talking about the vacuum hose to the fuel pressure regulator, take the vacuum hose off the regulator side. The regulator can twist without having to take it off, twist it so that the vacuum port goes from straight up, to down as far as you have room. If any gas comes out the vacuum port, even just enough to wet a fingertip, it’s bad[/QUOTE]Ok...i took the hose off while truck was idling surprisingly and suction was there but did not see any gas or wetness at the regulator tip. Engine bay does not smell gassy either. Now the tube vac hose before I started any of this did smell a bit gassy but not overwhelming. I'll try your Method and see what happens.
Ok great. I figured I had the wrong one once I got home. Thanks for the link.
Sorry...i was out of pocket so I couldn't answer. I got belt and everything else replaced and buttoned up...i started the tahoe up and same thing happens...at first a struggling idle at start up like 300-400rpm...then it idled at 500rpm strong...i let her run for about 8-10 minutes so I gave some gas and let off the throttle and engine shut off once it settled. Tried cranking several times after this and it's like it wasnt getting gas...started her up again and gave gas to keep alive...held for about five minutes and slowly let off throttle. Dropped to about 200rpm almost died but crept up to 400 rpm... been at temp and 400 rpm...just gunned again and drops to like 200-300rpmbit slowly crept up to almost 500 rpm. Could fuel filter be an issue? I have no engine light advising of any codes.
Ok...got me the correct fuel pressure tester...first key on pressure was 56 psi and 45psi with engine on...retried a couple of times after and pressure sat at 50 psi with just key on and 42 psi with engine on...it didn't go any lower with engine running. I pulled the vac line off the regulator but no signs of any gas leaking? Could it be the fuel pump?
