Lt1 problems datamaster file attached!
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Lt1 problems datamaster file attached! I am having problems with my LT1 in sig. the idle jumps up and down and sometimes i shifts really hard or holds the gear for way too long. I have replaced the TPS sensor months ago and it went away but now its back and im clueless??? i can also smell fuel really well when i am sitting idle. I have attached the file if someone can look at it and point me in the right direction?? 
http://www.mediafire.com/?sharekey=0...4e75f6e8ebb871
http://www.mediafire.com/?sharekey=0...4e75f6e8ebb871
I think your TPS is still screwed up. I never see it go to 0% when you're at idle, and I see low voltage at what I think is full throttle...look between records 504 and 552...I think you were holding the throttle on the floor there, but your TPS fluctuated a good deal through the 60-70mph range (2nd gear I think). That will also screw up how it shifts.
At record 555 I think you were completely off the throttle, but it showed 2.4% and high voltage for being closed all the way until record 752 where it looks like you got back into it.
Seems to me like a bad TPS, or a TB that is damaging your TPS...which TB do you have?
At record 555 I think you were completely off the throttle, but it showed 2.4% and high voltage for being closed all the way until record 752 where it looks like you got back into it.
Seems to me like a bad TPS, or a TB that is damaging your TPS...which TB do you have?
Good call I completely overlooked that. I would say either the throttle stop screw is not adjusted properly (stock throttle body) and or the holes on the sensor need to be slotted and adjusted (aftermarket throttle body)
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I'm still disagreeing with you, the voltage is too high at idle and too low at WOT...and fluctuates at both...that says the sensor is damaged, it might be damaged due to the TB...but adjusting the TB isn't going to fix the current sensor.
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I think your TPS is still screwed up. I never see it go to 0% when you're at idle, and I see low voltage at what I think is full throttle...look between records 504 and 552...I think you were holding the throttle on the floor there, but your TPS fluctuated a good deal through the 60-70mph range (2nd gear I think). That will also screw up how it shifts.
At record 555 I think you were completely off the throttle, but it showed 2.4% and high voltage for being closed all the way until record 752 where it looks like you got back into it.
Seems to me like a bad TPS, or a TB that is damaging your TPS...which TB do you have?
At record 555 I think you were completely off the throttle, but it showed 2.4% and high voltage for being closed all the way until record 752 where it looks like you got back into it.
Seems to me like a bad TPS, or a TB that is damaging your TPS...which TB do you have?
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ok well i replaced the TPS Sensor and i took another recording here is what i got.
this is with the motor off and just me hitting full throttle!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
this one is with the motor running!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
car seems to run fine now but i havent driven it too much! Is the rest of the readings look good? do you notice any other problems?
this is with the motor off and just me hitting full throttle!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
this one is with the motor running!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
car seems to run fine now but i havent driven it too much! Is the rest of the readings look good? do you notice any other problems?
ok well i replaced the TPS Sensor and i took another recording here is what i got.
this is with the motor off and just me hitting full throttle!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
this one is with the motor running!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
car seems to run fine now but i havent driven it too much! Is the rest of the readings look good? do you notice any other problems?
this is with the motor off and just me hitting full throttle!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
this one is with the motor running!
http://www.mediafire.com/?sharekey=0...eada0a1ae8665a
car seems to run fine now but i havent driven it too much! Is the rest of the readings look good? do you notice any other problems?
I disagree the high voltage at idle could be the stop screw and not getting full 100% tps could be a linkage/ throttle body shaft and or air intake hose clamp stopping it from going 100%. Either way a good or bad tps sensor is not going to make the rpms jump. It could cause a hesitation if it has a dead spot in it but not usualy a jump in rpms. Plus he said it was already a new one. so two bad tps sensors in a row is a stretch.
Thread Starter
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I disagree the high voltage at idle could be the stop screw and not getting full 100% tps could be a linkage/ throttle body shaft and or air intake hose clamp stopping it from going 100%. Either way a good or bad tps sensor is not going to make the rpms jump. It could cause a hesitation if it has a dead spot in it but not usualy a jump in rpms. Plus he said it was already a new one. so two bad tps sensors in a row is a stretch.
is there a certain way to adjust the stop screw?
When the TPS went out last APRIL it would IDLE at 1500 RPMS!! so when the TPS goes out on my car it tends to raise the Idle.
Now if i could find out why the TPS are going out???
Since i have replaced the TPS the idle is fine and the car seems to have more power and shift when its supposed to!
I disagree the high voltage at idle could be the stop screw and not getting full 100% tps could be a linkage/ throttle body shaft and or air intake hose clamp stopping it from going 100%. Either way a good or bad tps sensor is not going to make the rpms jump. It could cause a hesitation if it has a dead spot in it but not usualy a jump in rpms. Plus he said it was already a new one. so two bad tps sensors in a row is a stretch.
And a new TPS sensor seems to have "cured" the car again...something either caused them both to go bad, or he's buying cheap parts store brand sensors...I've seen people kill them with a pressure washer on the engine before, and I've seen aftermarket TB's (usually Holley's LT1 TB's are the worst) damage the sensors too.
