87 R10 Cuts off at stop lights

[cjbiondo89]

87 Silverado cuts off at stop lights in drive and neutral. stumbles and cuts out on accel surging real bad just very unresponsive. new IAC New Injectors I have checked for vaccum leaks....The previous owner installed a holley tbi and had 350 injectors in it (its a 305) please help!!

 

[89Suburban]

Check your fuel pressure.

 

[cjbiondo89]

how do I go about that theres no Schrader valve

 

[cjbiondo89]

also I forgot to say it runs great when you first start it up but once it gets about warm it wants to run like crap

 

[RetroC10Sport]

I'm inclined to think coolant temp switch (the one in the intake that the ECM reads.)

 

[cjbiondo89]

I'm inclined to think coolant temp switch (the one in the intake that the ECM reads.)

I replaced coolant temp sensor in feb. because it flat out wouldn't start when it was 40 degrees outside

 

[RetroC10Sport]

Shot that down.

Like 89S suggested, then it's time to check fuel pressure. You'll need an adapter though. I got this one myself.

http://www.ebay.com/itm/260732758647?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 It goes between the TB and fuel line instead of between the fuel filter under the truck and the fuel line.

 

[89Suburban]

He might have that famous split rubber line on the fuel pump.

 

[cjbiondo89]

He might have that famous split rubber line on the fuel pump.

what does that mean? lol

 

[cjbiondo89]

Shot that down.

Like 89S suggested, then it's time to check fuel pressure. You'll need an adapter though. I got this one myself.

http://www.ebay.com/itm/260732758647?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 It goes between the TB and fuel line instead of between the fuel filter under the truck and the fuel line.

ill order one thanks a lot!!

 

[HotRodPC]

He might have that famous split rubber line on the fuel pump.

what does that mean? lol

That means the piece of rubber fuel line that connects the in tank fuel pump to the metal fuel line, gets soggy and nasty, especially if you're running ethanol blended fuel, and it splits, then you're sucking 25-75% air with the fuel depending on how bad the split or rot has gotten.


PS Thread moved to Engine Performance/TBI & EFI Forum

 

[Jims86]

That means the piece of rubber fuel line that connects the in tank fuel pump to the metal fuel line, gets soggy and nasty, especially if you're running ethanol blended fuel, and it splits, then you're sucking 25-75% air with the fuel depending on how bad the split or rot has gotten.


PS Thread moved to Engine Performance/TBI & EFI Forum

Would be big time loss of driveability. Only stalling on stops.

 

[HotRodPC]

Would be big time loss of driveability. On stalling on stops.

That too. I was esplainin what 89S was referring to.

 

[Jims86]

Remember when carbs had the vac operated throttle kicker to keep the throttle from slamming shut and stalling? This is similar.

 

[HotRodPC]

Remember when carbs had the vac operated throttle kicker to keep the throttle from slamming shut and stalling? This is similar.

So it let's the butterflies close gradually kinda like poop being tappered on the ends so your ******* don't slam shut. Right? Yeah, I know exactly what you're talking about. Maybe they do too now.