Stumble in 90 TPI
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Junior Member
Joined: May 2000
Posts: 2
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From: Lincoln NE. USA
Stumble in 90 TPI
Problems with my engine will start to stumble then cut out when throttle is increased. Have hooked up a pressure gauge to it and fuel is Ok. I have also traded out the the modual in the distributor with no inprovement. The map tested out OK but the
tps had a small flat spot at3/4 throttle.
tps had a small flat spot at3/4 throttle.
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Joined: Jan 2000
Posts: 19,651
Likes: 309
Pro,
The dead spot in teh TPS is certainly no help. Make sure the TPS voltage at idle is correct, even if it non-adjustable there is a specified range. Assure that the minimum air position is set to 500-550 RPM. I presume you have TPI, so you might benefit from relocating the MAT sensor to a cooler location.
You might also want to check the EGR and PCV operation.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
The dead spot in teh TPS is certainly no help. Make sure the TPS voltage at idle is correct, even if it non-adjustable there is a specified range. Assure that the minimum air position is set to 500-550 RPM. I presume you have TPI, so you might benefit from relocating the MAT sensor to a cooler location.
You might also want to check the EGR and PCV operation.
------------------
Later,
Vader
------------------
"Make Me Bad"
Adobe Acrobat Reader 4.0
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