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1992 Silverado K1500 350 TBI NOT RUNNING

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1992 Silverado K1500 350 TBI NOT RUNNING

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Old January 16th, 2018, 7:42 PM
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Angry 1992 Silverado K1500 350 TBI NOT RUNNING

NEE
NEED HELP!

1992 silverado stepside extended cab with the 350 TBI standard 4x4

Will start but will not hold idle and there is no pedal reaction.

Replaced:

MAP
TPS
Throttle body with new injectors and all gaskets
Coolant temp sensor
Fuel filter
EGR
Ignition coil
IACV
All sensor vacuum lines
Distributor cap and rotor
Spark plugs

The truck is showing no codes.

No idea where to go from here! Any suggestions??

Thanks very much!

Jake
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Old January 16th, 2018, 9:33 PM
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So it starts but won't stay running @ idle? No pedal reaction - meaning no engine rev? I assume when you hit pedal you see the tbi linkage opening the throttle body? You have replaced alot of items - how about the ignition module in the distributor & plug wires? Has changing anything made any change at all?
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Old January 16th, 2018, 9:45 PM
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Yes, it will start after turning over quite a bit. By no pedal reaction, i mean that i cannot hold it at any rpm with the pedal. I need to constantly pump gas for it to try to keep running at all. It is backfiring a lot as well. The plug wires look fairly new, dont see any burn marks or bad connections. Have not tried the ignition module.

The new injectors improved the spray but still didnt effect the issUe.
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Old January 16th, 2018, 11:49 PM
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Did terrible run problem start suddenly or had it gradually become worse?
Please double & triple check your firing order. I just changed cap on my 93 last month and took me 3 tries to get wires back on correctly
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