Endev0ur
New member
Hi guys, I'm new here and just recently got this 1991 4.3L V6 GMC S15 Jimmy SLX from a co-worker that was fed up and frustrated with working on it.
Original issue is that it would drive fine, until the Service Engine Soon light would come on, then it would start to sputter. Give it too much gas, it would fall flat on it's face and want to stall out. Not enough gas, it would sputter and bog. All temperamental.
Well when the CEL comes on he (previous owner/co-worker) stated that the code it threw was if I remember correctly, TPS Low Voltage?
He (previous owner/co-worker) has replaced the following...
-Fuel Pump
-Fule Pump Sock
-Rotor Button
-Cap
-Wires
-Plugs
-Throttle Position Sensor
-Map Sensor
I just replaced the Distributor last night, with new Cap and Button. While it hasn't fixed the drive-ability of the vehicle, it did however fix the rough idle and now idles smoothly with or without the CEL on.
I would like to go ahead and replace the in line Fuel Filter anyways for added piece of mind. Might do that tomorrow.
So to get on with the current issue. Since I replaced the Distributor last night. Drives like a champ! That is until the CEL comes on, then it loses all power and seems to go into a limp mode to where I can barely give it any Gas/Throttle without it wanting to stall out flat on it's face. Like an instant kill of power band, let off the Gas and it'll bog back up to idle. So I get under the hood and finger the throttle seems to only open a certain degree without the stalling effect. Unplug the TPS and nothing changes, same effect and symptoms. Swapped out the TPS with another that came with the Jimmy and still the same effect that it's not reading the TPS. But this is only when the CEL is on, which comes and goes, but mostly stays on.
So now I'm to the point that my Google Search Criteria isn't bringing up any helpful info. Yet alone it was a pain to try and Google Search for TDC marks, Distributor marks, and even Firing Order for this 4.3L. So I'm at a loss and need help.
Original issue is that it would drive fine, until the Service Engine Soon light would come on, then it would start to sputter. Give it too much gas, it would fall flat on it's face and want to stall out. Not enough gas, it would sputter and bog. All temperamental.
Well when the CEL comes on he (previous owner/co-worker) stated that the code it threw was if I remember correctly, TPS Low Voltage?
He (previous owner/co-worker) has replaced the following...
-Fuel Pump
-Fule Pump Sock
-Rotor Button
-Cap
-Wires
-Plugs
-Throttle Position Sensor
-Map Sensor
I just replaced the Distributor last night, with new Cap and Button. While it hasn't fixed the drive-ability of the vehicle, it did however fix the rough idle and now idles smoothly with or without the CEL on.
I would like to go ahead and replace the in line Fuel Filter anyways for added piece of mind. Might do that tomorrow.
So to get on with the current issue. Since I replaced the Distributor last night. Drives like a champ! That is until the CEL comes on, then it loses all power and seems to go into a limp mode to where I can barely give it any Gas/Throttle without it wanting to stall out flat on it's face. Like an instant kill of power band, let off the Gas and it'll bog back up to idle. So I get under the hood and finger the throttle seems to only open a certain degree without the stalling effect. Unplug the TPS and nothing changes, same effect and symptoms. Swapped out the TPS with another that came with the Jimmy and still the same effect that it's not reading the TPS. But this is only when the CEL is on, which comes and goes, but mostly stays on.
So now I'm to the point that my Google Search Criteria isn't bringing up any helpful info. Yet alone it was a pain to try and Google Search for TDC marks, Distributor marks, and even Firing Order for this 4.3L. So I'm at a loss and need help.
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