Pulled codes today... - Page 2

PKRWUD · 08-03-2002, 08:50 AM

Think of it like a puzzle. The blade fits into the tangs. That's how the TPS turns when the throttle is turned. I suspect you may have the TPS installed incorrectly.

BTW, I am going to be gone until tomorrow sometime, so don't think I'm ignoring you today.

Take care,
~Chris

bobtodd · 08-03-2002, 08:25 PM

Well, I bought a new TPS today. After an hour of dinking around with it I finally got the readings I was looking for.... .9's. WOT was showing like 4.3.
I ended up messing with the idle screw a little bit so the blade on the throttle body wasnt screwing up my tps reading when it was bolted down. I could actually change my tps voltage by screwing the idle screw in or out. On my other TPS, when the throttle would open, the blade on top would go farther than the teeth on the tps would turn. That would cause the blade to shred through those plastic teeth and therefore ruin the tps. Well in order to keep those teeth from getting messed up, I changed the idle screw so that the blade was turned so it wouldnt do that.
Well, now my idle is too low...probably about 600 rpms. I didnt have the patience tonight...plus its getting dark, to mess with that. I filled up with 92 octane, poured some 104 octane boost in, set my timing at 16*, and disconnected the battery for a half hour. The car did seem to run better, but I'm still not getting the pull I should. I also noticed that after each shift the rpm's seem to hang for a split second before dropping. Not for long, but it's not like it should be. Any ideas? How can I fix my idle? Mess with the idle screw? Hopefully that doesnt mess up the tps reading. I guess I'll tinker some more tomorrow. This car is starting to get the best of me

...yawn.

jimberg · 08-03-2002, 08:49 PM

The proper way to adjust the idle screw is to back the screw out until you can slip a .010" feeler gauge between the end of the screw and the stop plate. Once you have this .010" gap, remove the gauge and turn the screw in 1 and 1/2 turns. Set your TPS to about .95 volts after doing this. You may need to elongate the holes on the tps so you have room to turn it. You can't just swivel it on one screw it has to turn. After doing all this, reset the computer as PKRWUD already described. After you hook up your battery, start the car and let it idle for 10 minutes with all accessories off. Turn the car off for a couple minutes. Start it back up and let it idle for another 10 minutes with all accessories on. Go for a test drive.

bobtodd · 08-08-2002, 07:53 PM

Thank you everyone for the help!! I think I am starting to get things back to normal with the car. I couldnt have done it without your knowledge and help. Thank you!!

PKRWUD · 08-08-2002, 07:55 PM

We take beer tips.

Take care,
~Chris

08-03-2002, 08:50 AM	#1
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Think of it like a puzzle. The blade fits into the tangs. That's how the TPS turns when the throttle is turned. I suspect you may have the TPS installed incorrectly. BTW, I am going to be gone until tomorrow sometime, so don't think I'm ignoring you today. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

08-03-2002, 08:25 PM	#2
bobtodd Registered Member Join Date: Dec 1998 Location: WI, U.S Posts: 255	Well, I bought a new TPS today. After an hour of dinking around with it I finally got the readings I was looking for.... .9's. WOT was showing like 4.3. I ended up messing with the idle screw a little bit so the blade on the throttle body wasnt screwing up my tps reading when it was bolted down. I could actually change my tps voltage by screwing the idle screw in or out. On my other TPS, when the throttle would open, the blade on top would go farther than the teeth on the tps would turn. That would cause the blade to shred through those plastic teeth and therefore ruin the tps. Well in order to keep those teeth from getting messed up, I changed the idle screw so that the blade was turned so it wouldnt do that. Well, now my idle is too low...probably about 600 rpms. I didnt have the patience tonight...plus its getting dark, to mess with that. I filled up with 92 octane, poured some 104 octane boost in, set my timing at 16*, and disconnected the battery for a half hour. The car did seem to run better, but I'm still not getting the pull I should. I also noticed that after each shift the rpm's seem to hang for a split second before dropping. Not for long, but it's not like it should be. Any ideas? How can I fix my idle? Mess with the idle screw? Hopefully that doesnt mess up the tps reading. I guess I'll tinker some more tomorrow. This car is starting to get the best of me ...yawn. __________________ 91 LX - 10.5:1 pistons, ported 289 heads, Ultradyne 588 cam, Cobra upper/lower, MSD, JBA long tube headers, Flowmaster, Richmond 4:10, roll cage, monster tach...FUN!! 95 SHO - K&N filter

08-03-2002, 08:49 PM	#3
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	The proper way to adjust the idle screw is to back the screw out until you can slip a .010" feeler gauge between the end of the screw and the stop plate. Once you have this .010" gap, remove the gauge and turn the screw in 1 and 1/2 turns. Set your TPS to about .95 volts after doing this. You may need to elongate the holes on the tps so you have room to turn it. You can't just swivel it on one screw it has to turn. After doing all this, reset the computer as PKRWUD already described. After you hook up your battery, start the car and let it idle for 10 minutes with all accessories off. Turn the car off for a couple minutes. Start it back up and let it idle for another 10 minutes with all accessories on. Go for a test drive. __________________ 351W 89 Mustang GT Convertible

08-08-2002, 07:53 PM	#4
bobtodd Registered Member Join Date: Dec 1998 Location: WI, U.S Posts: 255	Thank you everyone for the help!! I think I am starting to get things back to normal with the car. I couldnt have done it without your knowledge and help. Thank you!! __________________ 91 LX - 10.5:1 pistons, ported 289 heads, Ultradyne 588 cam, Cobra upper/lower, MSD, JBA long tube headers, Flowmaster, Richmond 4:10, roll cage, monster tach...FUN!! 95 SHO - K&N filter

08-08-2002, 07:55 PM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	We take beer tips. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

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