TBI stumbling under low throttle conditions

[GOY]

1988 5.7/A4 2WD.

 

Under low throttle conditions the engine will start to stumble and buck. My first guess will be vac. lines, TPS, and plugs wires. My question is, is there any gasket/vac line prone to drying and cracking in the TBI vehicles?

 

I've heard a rumor about the TB to Intake gasket ... true/untrue?

 

Thanks guys,

GOY

[duffy]

That is true. I had an 89 that was hard to start ( had to keep the throttle floored) and if you gave it any gas it would stumble and die. I ended up idleing back to the house and spraying carb cleaner around the tb to find the leak. I've also had a leaking head gasket cause the same thing. The truck would get a lope to it if you barely gave it gas and would go away if you gave it a little more. A few weeks later it blew out where a weak head bolt busted. You could tell it had been leaking for quite a while by the water stains. After put new head gaskets on it went away. May try doing a compression check on all cylinders and look for a low one. Sorry about rambling, good luck!

[chuckp]

1988 5.7/A4 2WD.

 

Under low throttle conditions the engine will start to stumble and buck. My first guess will be vac. lines, TPS, and plugs wires. My question is, is there any gasket/vac line prone to drying and cracking in the TBI vehicles?

 

I've heard a rumor about the TB to Intake gasket ... true/untrue?

 

Thanks guys,

GOY

 

<{POST_SNAPBACK}>

 

 

 

 

 

Gasket under the throttlebody..... its broken

 

chuck

[GOY]

1988 5.7/A4 2WD.

 

Under low throttle conditions the engine will start to stumble and buck. My first guess will be vac. lines, TPS, and plugs wires. My question is, is there any gasket/vac line prone to drying and cracking in the TBI vehicles?

 

I've heard a rumor about the TB to Intake gasket ... true/untrue?

 

Thanks guys,

GOY

 

<{POST_SNAPBACK}>

 

 

 

 

 

Gasket under the throttlebody..... its broken

 

chuck

 

<{POST_SNAPBACK}>

 

 

 

 

 

Thanks chuck - When I get a spare 30 minutes I'll be doing that gasket.