- #1
Danlenia
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- TL;DR Summary
- Recently my 01 LS started running poorly, runs fine about 10 sec then stumbles and boggs for about 5, it's kinda random. So I plug TPS in it, the problem still exists.
Hi there,
I'm in need of some ideas. Recently my 01 LS started running poorly, runs fine about 10 sec then stumbles and boggs for about 5, it's kinda random, doesn't matter of its cold or hot. On first start the RPM deep to about 500 then jump back to 800. Occasionally it dies. So I
disconnected the TPS, and behold, it runs amazing. Well, other than the high idle and terrible mileage. Anyway I ordered a TPS, plugged it in, no luck, runs exactly the same. But I was kind of expecting that. So I ordered an new one, but runs like crap again. So I plugged in my cheap OBD2 Bluetooth plug and using torque I looked at the readings.
Slowly moved the throttle from nigh to all and the app shows it pretty linear. No jumps or freezes. Nor during my testing with the engine of, nor during test drives. I was thinking the crank keyway maybe, but the timing is just sitting great, not bouncing or anything. I cleaned the maf with the CRC stuff, changed the air filter, and tried testing the TPS with a multimeter. I got the top wire at 5v constant (switched), middle wire ground and bottom wire variable voltage from 0.74 to 3.69.
Do these look right? I have read a very relevant material (mod edit: link deleted) (anyone interested can go and take a look) and feel that there are some issues. Do y'all think I just have 3 bad TPS, or something else.
Forgot to mention, a few months ago I replaced the cam and crank positron sensors as well as the O2 sensor.
I'm in need of some ideas. Recently my 01 LS started running poorly, runs fine about 10 sec then stumbles and boggs for about 5, it's kinda random, doesn't matter of its cold or hot. On first start the RPM deep to about 500 then jump back to 800. Occasionally it dies. So I
disconnected the TPS, and behold, it runs amazing. Well, other than the high idle and terrible mileage. Anyway I ordered a TPS, plugged it in, no luck, runs exactly the same. But I was kind of expecting that. So I ordered an new one, but runs like crap again. So I plugged in my cheap OBD2 Bluetooth plug and using torque I looked at the readings.
Slowly moved the throttle from nigh to all and the app shows it pretty linear. No jumps or freezes. Nor during my testing with the engine of, nor during test drives. I was thinking the crank keyway maybe, but the timing is just sitting great, not bouncing or anything. I cleaned the maf with the CRC stuff, changed the air filter, and tried testing the TPS with a multimeter. I got the top wire at 5v constant (switched), middle wire ground and bottom wire variable voltage from 0.74 to 3.69.
Do these look right? I have read a very relevant material (mod edit: link deleted) (anyone interested can go and take a look) and feel that there are some issues. Do y'all think I just have 3 bad TPS, or something else.
Forgot to mention, a few months ago I replaced the cam and crank positron sensors as well as the O2 sensor.