[00 SS]

My daily driver is an 88 Buick Park Ave. Lately, I've been having trouble with it running right when the engine is hot and I restart it. Almost seems to be vapor locking, but it's multiport fuel injection. Ocationally when this happens, I can bleed some "air" or maybe fuel vapor out of the schrader valve on the rail which sometimes helps, sometimes not. It starts, then idles like it's missing badly and the engine won't rev up. So far, I've been able to coax it into working and getting me where I need to go, but I at a bit of a loss as to why this is happening all of a sudden (the last week or so). The weather hasn't been too bad lately and it was certainly hotter earlier in the summer and it ran fine. It seems OK while I'm driving and after it's been allowed to cool down all the way.

The recent maintenance includes:
new fuel filter
new plugs
new coil packs and igniton contol module
Removed and cleaned injectors (really were pretty clean to begin with)

My ideas:
fuel pump is low on pressure allowing the fuel to vaporize in the rail while sitting after driving
Bad presure regulator not holding the pressure up while sitting after driving, or sticking not allowing the vapor to exit and return to the tank.

Any insight or ideads would be appreciated.

[00 SS]

Of course, now that I'm trying to figure it out, it quits acting up. It ran fine the last 2 days. At least I've been able to burn off some of the fuel in the tank. I think it may be low enough now to be able to remove the tank without crushing myself.

[CrashTestDummy]

Of course, now that I'm trying to figure it out, it quits acting up. It ran fine the last 2 days. At least I've been able to burn off some of the fuel in the tank. I think it may be low enough now to be able to remove the tank without crushing myself.

It's just waiting to catch your wife all dressed up to go somewhere out on a rainy cold night an hour from home, and 30 minutes from her destination to completely quit working. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/banghead.gif) Or worse, quit at a light while she's on her way to work one morning and you're already at work an hour away from her, not that I really know about anything like that. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/unsure.gif)