Low rpm stumbling

[RossGN]

Well, I'm tired of looking at it sit in the garage, so I guess I'll dig into it.:

86 GN 126k

Will not run at low rpms - 0 - 2500 - Have to kinda feather the pedal to keep it running - runs a little better when warm, but not much.

Above that point, it runs great.
Turbolink shows mucho lean

Hate to just start changing out stuff.

TPS is set correctly (looks like previous owner replaced it to try to deal with this)
New plugs and wires
New fuel filter
fuel pressure idling is 39 psi line of (has stock regulator)
MAF passes screwdriver tap test

What's the next thing to check?

Tia

 

[RossGN]

Anyone?

 

[Carolinaturbot6]

What condition is the fuel filter in Ross? What about the cat convertor? Maybe it's stopped up some.

Mucho lean points to the fuel system somewhere. Have you checked for exhaust leaks anywhere?

 

[RossGN]

Just replaced the fuel filter last night...fuel pressure is 39 psi line of....holds steady pressure as you go up in rpms.

I haven't detected any audible exhaust leaks, but i'll double check.


thanks

ross

 

[Eric Stage I]

What kind of MAF readings are you getting? Have you tried to start it with the MAF disconnected?

Eric

 

[RossGN]

thanks eric

i'll give that a shot

 

[Fuelie600]

Replace your MAF hose. Make sure your clamps are tight but not to the point of cutting into the hose. HTH Brian