Tahoe hot start problem

Sounds like vapor lock. (yes it can happen with FI). Try insulating fuel line in engine compartment. It runs rough for a bit until vapor is purged.

----------------- TheSnoMan.com

I had the exact same problem on my 2000. Take off the vacuum hose to the Fuel Pressure Regulator and see if fuel is present. If it is, you might have to replace the FPR. IIRC, the fuel pressure regulator was on the fuel rail, driver side, near the firewall and is a 15 min DIYer job to replace it. Be careful of the screen and little o-rings that come out with it.

HTH,

Derek

I'm a shadetree at best so your milage may vary... Is it possible that the ECT (engine coolant temp sensor) is false reading a rich condition thereby cutting fuel trim? I have seen this on more than one vehicle with the exact same issues. If you don't find that there's a fuel pressure problem, you may want to try unplugging the ECT next time it won't turn over. When you force the computer into limp mode, if it starts, it may point to being as bad ECT. I know that ECTs traditionally don't always show codes unless it's a dead short (more than likely is that the sensor gets lazy from a wonky thermositor? Do-hickey. Again, this may not be a needle in a haystack for you but as a reference, it certainly won't hurt. I would definitely force limp if the vehicle isn't starting - at least you could outrule just about any of the 5V feedback sensors pretty quickly.

Thanks and good luck. Andrew.

Is this a dealer part or can I get it at a local parts store, I don't mind taking it to the dealer but I know that they will check the hell out of it for hours and I'll get a 2 or 3 hundred or bill for a $10 part, as it is I'm very surprised at all the things going wrong with a

Thanks Derek, pulled the hose off and gas came out of the hose, started the truck let it run , went out for a ride , got some lunch started fine, guess I'll replace it someone warned about springs and nuts and bolts coming out so I guess I'll have to be careful

IIIRC the dealer wanted $80-$100. I got mine from NAPA for about 1/2 that. The problem with the NAPA one was the vacuum line nipple diameter was too small so I have to zip tie the vacuum line on or else it would fall off. My want to get a GM one from one of the online vendors to avoid a vacuum leak.

Be careful as there is a small o-ring that can easily get into the fuel rail.

HTH,

Derek