Bad TPS?
#1
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Car: '67 C10
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: Yes
Bad TPS?
I've got a 87 or 88 5.0 TPI in a 67 C10 Truck.
She starts and Idles nicely. But when I give her any throttle at all she stumbles and dies.
This use to be an intermittant problem. It would even happen while driving. Now it's constant and I cannot drive her at all.
When I could still drive her, she always suffered from delayed throttle response.
I bought an OTC 2000 Scanner but I'm getting "NO DATA". Hopefully I'll find time to trace the ALDL wiring back to the ECM this weekend.
So I tested the TPS as I had before. I'm getting 0.65 volts at idle. But as I approach it goes just over 4.0 volts then I get O.L. (open lead) at WOT.
Is my TPS bad? Or do I need to adjust something on the TB or TPS?
She starts and Idles nicely. But when I give her any throttle at all she stumbles and dies.
This use to be an intermittant problem. It would even happen while driving. Now it's constant and I cannot drive her at all.
When I could still drive her, she always suffered from delayed throttle response.
I bought an OTC 2000 Scanner but I'm getting "NO DATA". Hopefully I'll find time to trace the ALDL wiring back to the ECM this weekend.
So I tested the TPS as I had before. I'm getting 0.65 volts at idle. But as I approach it goes just over 4.0 volts then I get O.L. (open lead) at WOT.
Is my TPS bad? Or do I need to adjust something on the TB or TPS?
#2
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Car: 1988 Pontiac trans am/gta
Engine: 350
Transmission: 700r4
Axle/Gears: 3.23's
any O.L in the tps range between .54 and wot ( 4.0- 4.5) depending. Should be replaced
#4
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Car: '67 C10
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: Yes
Crap! I sure as hell didn't want to hear that. But thanks for the info.
I'll replace the TPS.
#5
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Car: '67 C10
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: Yes
I installed a new TPS today. I have it at 0.71 volts closed and it goes smoothly to just over 4.0 volts WOT.
I fired her up and had the same symptoms.
I took the neg cable off the battery, maybe that'd help.
While I waitedI traced the aldl wring and did a continuity test from the ALDL Test and data terminals (B,E,M). Wiring tested fine to the ECM connector. I noticed the longer connector tab was not engaged so I firmed up the connections.
I reconnected the battery, fire her up and shes a little better. I drive her around and after a while all symptoms are gone. even the stumble I had when I'd decelerate rapidly.
So I decided to try out my scanner. I don't get "No Data" anymore. Now I just get "wait". I've waited about 15 minutes now and it still reads "wait".
I fired her up and had the same symptoms.
I took the neg cable off the battery, maybe that'd help.
While I waitedI traced the aldl wring and did a continuity test from the ALDL Test and data terminals (B,E,M). Wiring tested fine to the ECM connector. I noticed the longer connector tab was not engaged so I firmed up the connections.
I reconnected the battery, fire her up and shes a little better. I drive her around and after a while all symptoms are gone. even the stumble I had when I'd decelerate rapidly.
So I decided to try out my scanner. I don't get "No Data" anymore. Now I just get "wait". I've waited about 15 minutes now and it still reads "wait".
#6
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Car: '67 C10
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: Yes
I go back after the last post. Now reads "no data".
She drives fine now. Could I still have a bad ECM?
She drives fine now. Could I still have a bad ECM?
#7
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Car: 1988 Pontiac trans am/gta
Engine: 350
Transmission: 700r4
Axle/Gears: 3.23's
If your problems are gone i would suppose not, sometimes these old cars are fussy, try moving the connector a bit and see if it shows it.
And yeah u reset the ecm when u disconnected the battery, then u let the computer relearn everything while u drove. Thats why its gone
Glad its fixed, i wish myn was that easy.. lol
And yeah u reset the ecm when u disconnected the battery, then u let the computer relearn everything while u drove. Thats why its gone
Glad its fixed, i wish myn was that easy.. lol
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