...when it warms up. Timing belts on right, ignition timing in the ballpark, EGR disconnected, MSD fuel pump putting out WAY more than enough...

When you first fire it up, you can get on it and it screams like a banshee and it propels the super beetle that it's in like a rocket. But when it warms up, you can't give it more than a certain amout of throttle, or it wants to die out. If you floor it, it pukes, but if you slowly give it gas, it'll rev waaaay up.

It 'sounds' like it's leaning out. That MSD pump is putting out more volume and pressure then that engine could ever use. It NEVER appears to be running rich. Fuel pressure reg? Coolant sensor? Checked the TPS, that seems ok.

No way to pull up codes yet, it isn't wired for that yet. Oh, and she always will restart and idle. Weird.

Coolant temp sensor maybe(likely).. could also be a vacuum leak.. intake keaks are notorius for not manifesting themselves until the engine is warm

 

also, you said the EGR system is not hooked up.. my car doesn't work quite right when the EGR isn't hooked up.. so this could be part of the problem, as it would be active when the engine reaches operation temp, but not whn cold.

Just put this engine together, so it has new gaskets. When I mean warmed up, I mean about 2 minutes of run time. I'll check for vac. leaks, though.

bump

funny thing my turbo does the same thing. it runs like a scalded dog when cold, but once warm, she cuts out when you open her up, cant get mre than 1500 revs, and is impossible to start.

 

i changed out my coolant sensor, it didnt change anything(although my replacement may be bad...)

 

i heard a slight puffing noise on thepassenger side, i think it was a cross threaded plug, pulled it and re threaded it. still does all this craziness. if the puffing is there i will check out my intake gasket/

 

anyway, if you fix your problem, let me know so i cna try that, i will do the same!!

what is your base fuel pressure (at idle)

 

My bet is your MSD pump is overrunning the stock FPR. The FPR works on vacume pressure so the more throttle you give it the more gas you get.

 

Josh