idling problem with the plunger? April 27, 2008, 10:50:03 PM Hi all, I'm a newbie. I just inherited a '87 T-Birb Turbo Coupe with 223,000 km. It' runs great, doesn't leak or use a drop of oil. But it has an Idling problem. Usually it appears after the first stop and start. For some reason the idle will stick at around 2000 RPM. My brother said that when it happens, turn the key on and off, so that the engine doesn't turn over, and it will correct it. But that's not fixing it. He had a mechanic look at it, and he said it was a problem with the plunger getting stuck. I guess he tried to find the part, but couldn't find a replacement. But some times, I can sit at a red light, and it will slowly climb. Cycle the iginition, and it calms down.To me it seems to be electronic. But I don't know.Any ideas? Quote Selected
idling problem with the plunger? Reply #1 – April 27, 2008, 11:43:25 PM try running codes. maybe a tps problem. Quote Selected
idling problem with the plunger? Reply #2 – April 28, 2008, 12:54:48 AM Plunger == Idle Air control valve?Does it have a hard time starting, or tend to roll back in forth while at idle? Quote Selected
idling problem with the plunger? Reply #3 – April 28, 2008, 01:08:02 AM Quote from: Haystack;216080try running codes. maybe a tps problem.x2paperclip = code reader Quote Selected
idling problem with the plunger? Reply #4 – April 28, 2008, 09:02:13 AM Yes at a red light, the idling does goup and down between 1000 and 1200 RPM.But it always does start fine. Quote Selected
idling problem with the plunger? Reply #5 – April 28, 2008, 10:04:21 AM I just spoke with my brother who talked to the mechanic who said it was the computer that's causing the Idle Air Control Valve to stick. Replacing the Idle Air Control Valve won't help.Any ideas what computer is in this car, and where I might find one. If I have to change it, are the anything I have to setup again, like idle and such? Quote Selected
idling problem with the plunger? Reply #6 – April 28, 2008, 10:57:11 AM Dont believe the "mechanic"s. The guys here know way more than any regular old mechanic. Quote Selected
idling problem with the plunger? Reply #7 – April 28, 2008, 05:34:39 PM CHECK YOUR TPS VOLTAGE... Common problem on 2.3T... Won't necessarily cause a code... Quote Selected
idling problem with the plunger? Reply #8 – April 28, 2008, 09:39:08 PM Remember, I'm a newbie with this car. Can I check it with a voltage meter, and if so how.I'm really thinking it might be easier to replace it with a working ECM, but find one is like pulling teeth. If anyone has anyone suggestions where I can find a replacement, please post it. Quote Selected
idling problem with the plunger? Reply #9 – April 28, 2008, 11:28:55 PM How do I take the TPS voltage, and what should it be? Quote Selected
idling problem with the plunger? Reply #10 – April 29, 2008, 12:04:04 AM Ask, and you will recieve....links to other pages because it need not be repeated here..http://www.allfordmustangs.com/Detailed/581.shtml Quote Selected
idling problem with the plunger? Reply #11 – April 29, 2008, 12:04:43 AM Ask and you will receive...links to other pages that explain it betterhttp://www.allfordmustangs.com/Detailed/581.shtml Quote Selected
idling problem with the plunger? Reply #12 – April 29, 2008, 12:28:33 AM Quote from: 84monte;216244How do I take the TPS voltage, and what should it be?I copied this from the article in danzajax link1) Loosen the two screws holding on the TPS, (The screws can be very stubborn, so make sure you have a good quality screw driver that fits snug and has a long handle for lots of torque, or you might strip the heads) just enough to able to swivel the TPS with force.2) Pierce the "GREEN" wire with the pin and hook the positive (+) lead from the voltmeter to it.3) Ground the negative (-) lead from the voltmeter. Use a good ground, like the engine or other grounded metal source.4) Turn your ignition key to the run position, but do not start the vehicle5) Rotate the TPS until you achieve .98 to .99 Volts (For stock or slightly modified engines).6) Tighten the screws on the TPS and recheck.NOW this isn't totally correct... The voltage reading SHOULD be taken from the green to the black wire, NOT the engine block... ALSO the setting for .98-.99 volt is BS... You'll never notice a difference anywhere from prob .8 to .99... At 1v or more you're flirting with a high idle issue... Set it for .9v and forget it...IF this is your problem(likely) you can throw 40 ECMs at it and NOT fix the problem... Quote Selected
idling problem with the plunger? Reply #13 – April 29, 2008, 11:33:45 AM That was just the best description I found. Quote Selected
purchased: 1 aftermarket TPS Reply #14 – May 10, 2008, 08:14:45 PM OK, you all make great sense, and I purchased a new TPS. I've located the current one, and it looks simple enough for even a newbie like me can do.This one has where the screw holes are, there not just holes, so it looks like it can be adjusted, not like the factory one. If I put it in, and it's not in the right position, it will probably just idle too low or too high, right?TIA. Quote Selected
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