Maveric Posted October 5, 2008 Share Posted October 5, 2008 Hey y'all I cleaned my throttle plate with throttle cleaner, and then I got a high idle at 2, so I checked my vac lines and not a one seems to be leaking. I thought it might be the IAC but after i replaced it, it went down when it first starts to a idle of 1.5 but then after running for awhile goes back up to a 2 when idling, what could be the problem? there another thing that could be screwing up? Link to comment Share on other sites More sharing options...
chicofuentes0224 Posted October 5, 2008 Share Posted October 5, 2008 Did you remove the TB when you cleaned it? Is it possible you haven't hooked one of the vac lines back up? Did you remove the TPS when you cleaned it? Link to comment Share on other sites More sharing options...
BLHTAZ Posted October 5, 2008 Share Posted October 5, 2008 I just went through the high idle problem, but mine was a ground issue... http://comancheclub.com/forums/viewtopic.php?t=12188 Did you be sure to use an Oxygen Sensor safe cleaner? Link to comment Share on other sites More sharing options...
Maveric Posted October 5, 2008 Author Share Posted October 5, 2008 TB i assume means throttle body, and no i removed the hose thing above it, scrubbed the plate then wham high idle... TPS? aren't those the reports Peter had to fill out in office space? other than that i have no idea what a TPS is... and Oxygen sensor safe cleaner? i dunno it was throttle, carb, and something cleaner... As for hoses the only one I removed was the big one over the throttle body, other than that I didn't remove anything. Link to comment Share on other sites More sharing options...
chicofuentes0224 Posted October 5, 2008 Share Posted October 5, 2008 TB, yes throttle body. TPS is the sensor that sits right next to the IAC. (Throttle Position Sensor) There is a TB Cleaner that is safe to use with vehicles equiped with an O2 sensor. I understand you didn't disconnect anything else but follow every vaccum line in the area and make sure they are connected to something. I've hit the vac line on the intake manifold by mistake a couple times, disconnecting it and getting a high idle from it. Lastly is is possible that you cleaned up the plate in the TB but gummed up everything under it with crap dripping and you could have plugged up the IAC hole or fried the TPS. Wait for someone else's opinion because I'm not an expert by any means but after checking the vac lines again I'd take the TB off comepletely, clean it really well, checking where the IAC goes and then put everything back together. Remember you have to adjust the TPS with either a scanner or a multimeter. If you run a search on this forum there's a couple places the directions are described or somebody might be able to link it for you. I'll see if I can get you a picture of the TPS. Link to comment Share on other sites More sharing options...
chicofuentes0224 Posted October 5, 2008 Share Posted October 5, 2008 IAC is on the left. The TPS is the sensor on the right. Link to comment Share on other sites More sharing options...
Maveric Posted October 6, 2008 Author Share Posted October 6, 2008 hate to ask but if i fried it, how much is a TPS and whats the part number? Link to comment Share on other sites More sharing options...
chicofuentes0224 Posted October 6, 2008 Share Posted October 6, 2008 BLHTAZ has one for sale in the classifieds. You can try your local parts store but my personal experience is to avoid anything ,especially electrical that says MADE IN CHINA. I've seen em anywhere from $40-$100+. Link to comment Share on other sites More sharing options...
BLHTAZ Posted October 6, 2008 Share Posted October 6, 2008 I searched all over and the best price I found was $92 around here for the Renix era engine. Link to comment Share on other sites More sharing options...
chicofuentes0224 Posted October 6, 2008 Share Posted October 6, 2008 I personally bought mine from NAPA a year back. Retail price was $57 I got it for $40. I wouldn't recomend it to you only because I've had an incredibel amount of problems with NAPA's parts recently and even tho my TPS seems to be working fine I'm waiting for the day it goes poof. Link to comment Share on other sites More sharing options...
FxRacing282 Posted October 6, 2008 Share Posted October 6, 2008 you probably didn't fry your TPS. The IAC motor has its own hole that allows air to run through it when the throttle plate is closed. (ilde air controller) it permits only a certain amount of air to run through it. I'm pretty sure that when a TPS goes bad if you put it to the floor it will have very poor to no engine acceleration at all. in theory it would run very very lean, the O2 sensor would tell the engine more gas so it would take some time to get to engine speed. take the IAC out, clean the tip on it. WITHOUT anything abrasive. clean the hole with a mini toothbrush like thing. you know what a chimney cleaner is? like that but smaller and plastic. put it back on. how are you sure that you have no vacuum leaks? Link to comment Share on other sites More sharing options...
Maveric Posted October 8, 2008 Author Share Posted October 8, 2008 ran all my vac hoses down, still high on the idle, unplugged the one that leads to the "map sensor" and...no high idle, has air flowing through the hose (making a spfff sound) map sensor go bad after i cleaned the throttle plate? or what? Edit: I do know that the correct amount of power is running to the sensor (5 volt and 2.5) by using an ohm meter but i don't know how the sensor is working as i can't get a probe in there the right way without busting something. Link to comment Share on other sites More sharing options...
BLHTAZ Posted October 8, 2008 Share Posted October 8, 2008 Here is the testing procedure for the MAP Sensor from the FSM... ------------------------------------------------------ MAP Sensor Test 1) Inspect MAP sensor hoses and connections. Repair as necessary. With ignition on and engine off, test MAP sensor output voltage at connector terminal "B". (Marked on sensor body). See Fig. 5. Output voltage should be 4 to 5 volts. 2) To verify wiring harness condition, test ECU terminal C-6 for same voltage described. Test MAP sensor supply voltage at sensor connector terminal "C" with ignition on. 3) Voltage should be 4.5-5.5 volts. Same voltage should also be at terminal C-14 of ECU wire harness connector. Using Diagnostic Tester (M.S. 1170), test MAP sensor ground circuit at terminal D-3 and terminal "A" of sensor connector. 4) Using an ohmmeter, test MAP sensor ground circuit at ECU connector between terminal D-3 of ECU connector and terminal B-11 with an ohmmeter. 5) If ohmmeter or diagnostic tester indicates an open circuit, inspect for a defective sensor ground connection, located on right side of cylinder block. If ground connection is good, ECU may need to be replaced. Link to comment Share on other sites More sharing options...
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