TPS or Timing?
04-06-2007, 08:03 AM
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TPS or Timing?
It is spring here in South Central Alaska finally and the ambient temp yesterday was up in the low fourties. Nice and toasty. The roads are not covered with ice and everyone it hammering their cars through the gears once they hit the highway. Even me in my stock truck.
However, my 93 3.0 V6 didn't like accelerating between 3rd and 4th gears, and once in 5th it had not much power. I could still gain speed as long as I didn't hammer the gas pedal down. If I go gently with the acceleration there is not much hesitation. If I hammer it it hesitates a lot and occassionally there is a clunking sound that I am taking as backfiring.
When it was cold this morning it ran fine and I even had the chance to hammer it once between 3rd and 4th gears. No hesitation, but the ambient air is about 25 during the drive.
In the last month it started to stall out when shifting between 1 and 2 when it was cold (3 minute warm up at 15 degrees ambient). I was thinking at the time that my clutch foot sucked and that I was being lazy while driving. Now though I am not so sure it was just me.
Searching last night on this forum I found a lot of posts on the throttle position sensor and the timing and the huge amounts of problems the TPS has caused people. It also sounds like the TPS is a real joy to test and adjust.
The searching gave me these things to look at to deal with the hesitation under acceleration:
TPS
Timing
Fuel filter
Air filter
I am also wondering about the air flow sensor/meter. AMF or MAF? I am wondering about this since the hesitation is happening now that the ambient temps on the drive home are above 40.
Any additional things I should look into?
This truck is new to me for the past 6 months, but has been well cared for by the previous owners. The plugs and wires were replaced a year ago, but I belive I am going to change the air filter this w/e while checking on the rest of the issues.
However, my 93 3.0 V6 didn't like accelerating between 3rd and 4th gears, and once in 5th it had not much power. I could still gain speed as long as I didn't hammer the gas pedal down. If I go gently with the acceleration there is not much hesitation. If I hammer it it hesitates a lot and occassionally there is a clunking sound that I am taking as backfiring.
When it was cold this morning it ran fine and I even had the chance to hammer it once between 3rd and 4th gears. No hesitation, but the ambient air is about 25 during the drive.
In the last month it started to stall out when shifting between 1 and 2 when it was cold (3 minute warm up at 15 degrees ambient). I was thinking at the time that my clutch foot sucked and that I was being lazy while driving. Now though I am not so sure it was just me.
Searching last night on this forum I found a lot of posts on the throttle position sensor and the timing and the huge amounts of problems the TPS has caused people. It also sounds like the TPS is a real joy to test and adjust.
The searching gave me these things to look at to deal with the hesitation under acceleration:
TPS
Timing
Fuel filter
Air filter
I am also wondering about the air flow sensor/meter. AMF or MAF? I am wondering about this since the hesitation is happening now that the ambient temps on the drive home are above 40.
Any additional things I should look into?
This truck is new to me for the past 6 months, but has been well cared for by the previous owners. The plugs and wires were replaced a year ago, but I belive I am going to change the air filter this w/e while checking on the rest of the issues.
04-06-2007, 08:48 AM
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It is spring here in South Central Alaska finally and the ambient temp yesterday was up in the low fourties. Nice and toasty. The roads are not covered with ice and everyone it hammering their cars through the gears once they hit the highway. Even me in my stock truck.
However, my 93 3.0 V6 didn't like accelerating between 3rd and 4th gears, and once in 5th it had not much power. I could still gain speed as long as I didn't hammer the gas pedal down. If I go gently with the acceleration there is not much hesitation. If I hammer it it hesitates a lot and occassionally there is a clunking sound that I am taking as backfiring.
When it was cold this morning it ran fine and I even had the chance to hammer it once between 3rd and 4th gears. No hesitation, but the ambient air is about 25 during the drive.
In the last month it started to stall out when shifting between 1 and 2 when it was cold (3 minute warm up at 15 degrees ambient). I was thinking at the time that my clutch foot sucked and that I was being lazy while driving. Now though I am not so sure it was just me.
Searching last night on this forum I found a lot of posts on the throttle position sensor and the timing and the huge amounts of problems the TPS has caused people. It also sounds like the TPS is a real joy to test and adjust.
The searching gave me these things to look at to deal with the hesitation under acceleration:
TPS
Timing
Fuel filter
Air filter
I am also wondering about the air flow sensor/meter. AMF or MAF? I am wondering about this since the hesitation is happening now that the ambient temps on the drive home are above 40.
Any additional things I should look into?
This truck is new to me for the past 6 months, but has been well cared for by the previous owners. The plugs and wires were replaced a year ago, but I belive I am going to change the air filter this w/e while checking on the rest of the issues.
However, my 93 3.0 V6 didn't like accelerating between 3rd and 4th gears, and once in 5th it had not much power. I could still gain speed as long as I didn't hammer the gas pedal down. If I go gently with the acceleration there is not much hesitation. If I hammer it it hesitates a lot and occassionally there is a clunking sound that I am taking as backfiring.
When it was cold this morning it ran fine and I even had the chance to hammer it once between 3rd and 4th gears. No hesitation, but the ambient air is about 25 during the drive.
In the last month it started to stall out when shifting between 1 and 2 when it was cold (3 minute warm up at 15 degrees ambient). I was thinking at the time that my clutch foot sucked and that I was being lazy while driving. Now though I am not so sure it was just me.
Searching last night on this forum I found a lot of posts on the throttle position sensor and the timing and the huge amounts of problems the TPS has caused people. It also sounds like the TPS is a real joy to test and adjust.
The searching gave me these things to look at to deal with the hesitation under acceleration:
TPS
Timing
Fuel filter
Air filter
I am also wondering about the air flow sensor/meter. AMF or MAF? I am wondering about this since the hesitation is happening now that the ambient temps on the drive home are above 40.
Any additional things I should look into?
This truck is new to me for the past 6 months, but has been well cared for by the previous owners. The plugs and wires were replaced a year ago, but I belive I am going to change the air filter this w/e while checking on the rest of the issues.
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