Trying To Fix Hesitation....tps???
11-02-05, 11:13 AM
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Trying To Fix Hesitation....tps???
Okay i've tried just about every method there is for setting the tps. If i set the tps at 1 volt at idle(hot engine) using the green/red wire i get hesitation with light load and light throttle application.
If i use the ohms method by unplugging the tps connector and set the tps to 1 ohm using the black and green/red wire the hesitation goes away. But when i hook everything back up and check the voltage at the green/red wire it reads at .64 volts. Does this mean i have a bad tps??? Why are these two methods of testing so far off?
I've checked for dead spots before and found none...and i made sure that all of the above testing was done on a fully hot engine... and my motor pulls 19inhg. Doubt if it is a vacuum leak, all vacuum lines have been replaced.
If i use the ohms method by unplugging the tps connector and set the tps to 1 ohm using the black and green/red wire the hesitation goes away. But when i hook everything back up and check the voltage at the green/red wire it reads at .64 volts. Does this mean i have a bad tps??? Why are these two methods of testing so far off?
I've checked for dead spots before and found none...and i made sure that all of the above testing was done on a fully hot engine... and my motor pulls 19inhg. Doubt if it is a vacuum leak, all vacuum lines have been replaced.
11-02-05, 11:23 AM
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Originally Posted by joel91
.... If i use the ohms method by unplugging the tps connector and set the tps to 1 ohm using the black and green/red wire the hesitation goes away. But when i hook everything back up and check the voltage at the green/red wire it reads at .64 volts.....
11-02-05, 11:10 PM
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If you are suffering from hesitation maybe you should try searching the Archive.
At the very top there is a nice little thread about regrounding things. It also says that it might fix hesitation.
At the very top there is a nice little thread about regrounding things. It also says that it might fix hesitation.
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11-03-05, 06:25 AM
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Oops.
Weak grounds are so common that I jumped on that without looking further.
Resistance ~1K, Volts ~.6 -- The voltage source must be weak, or the TPS resistance is not stable/repeating.
Check the IG1 12v feed to the TPS. If it's good then the TPS has to be about worn out.
Weak grounds are so common that I jumped on that without looking further.
Resistance ~1K, Volts ~.6 -- The voltage source must be weak, or the TPS resistance is not stable/repeating.
Check the IG1 12v feed to the TPS. If it's good then the TPS has to be about worn out.
11-03-05, 11:03 AM
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well i got a break from work and went out to my car to test, this is what i got at the tps:
green\red- 1v
orange-5v
yellow-.89v
red-5v
blue- ground 12v to battery pos
black- ground12v to battery pos
all measurements where taken with engine warm and tps connector connected....but didn't you say there is supposed to be a 12v feed wire to the tps. The only 12v i got was the blue and black wires but only when connected meter to battery pos. Should i be getting 12v somewhere where im not getting it???
green\red- 1v
orange-5v
yellow-.89v
red-5v
blue- ground 12v to battery pos
black- ground12v to battery pos
all measurements where taken with engine warm and tps connector connected....but didn't you say there is supposed to be a 12v feed wire to the tps. The only 12v i got was the blue and black wires but only when connected meter to battery pos. Should i be getting 12v somewhere where im not getting it???
11-03-05, 12:08 PM
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The 12v reading is what you should see at one of the two pins of the TPS check connector. One should show 0 and one should show ~12v. Key on engine fully warmed up.
11-03-05, 02:48 PM
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Originally Posted by Chuck
The 12v reading is what you should see at one of the two pins of the TPS check connector. One should show 0 and one should show ~12v. Key on engine fully warmed up.
(A)(B)
..(C)
^ if I'm looking at the plug like this, with the positive line on the multimeeter in (C.) & the negative on A or B,..
Should I set (A) to 12v & (B) to 0v?..
or (B) to 12v & (A) to 0v.
..or does it make a difference?
11-03-05, 03:15 PM
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Here is that video of my previous bad TPS mis-fire. link to short video
That TPS had a 0 ohms spot at about 10% throttle.
That TPS had a 0 ohms spot at about 10% throttle.
Last edited by SureShot; 11-03-05 at 03:17 PM.
11-03-05, 05:04 PM
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i found one at advance auto parts for $138 bucks....thats great compared to 350 that mazda wants. GP Sorenson makes the one at advance. Would this tps work i mean all that is in there is resitor right
11-04-05, 08:31 AM
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When you are checking and setting TPS voltage at the TPS check connector, it makes no difference whether A-B or A-C shows 12v as long as you adjust the TPS such that the other shows 0. Set it and do a 10-15 minute test drive. Then come back and verify the setting. Then make sure you set the idle speed to 600-800 rpm.
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