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tps issues?

 
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Old 10-07-2014, 11:29 AM
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tps issues?

Alright so, I got 5 codes out of my 91 2.1. 1 & 2 being oxygen sensors, 3 map, then 7 & 8, tps and tdc. Pulled the tps off an instead of falling on it's face it idled out fine with no misfire. Before the tps replacement I had all those codes plus a check engine light. When I replaced the tps, all my codes went away as well as my CEL. But it still misfires. Isn't a dead miss though. Sounds like too much or not enough fuel/air. But no codes, no CEL, new tps. Starts out fine, get out on the road and give it throttle and the car almost dies. Idk if i should try the crank position sensor, thats what my mechanic is telling me. Cuz that's an expensive maybe :/
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Old 10-08-2014, 09:53 AM
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Re: tps issues?

Go to a j-yard. It'll be at the end of your exhaust cam. See if the wires are connected first.
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Old 10-10-2014, 01:42 PM
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Re: tps issues?

Got a j-yard distributor and it didn't help at all. Starts fine, purs like a kitten when cold. But as soon as it warms up, it almost sounds like a dead miss. But i did plugs and cap n rotor.
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Old 10-10-2014, 02:27 PM
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Re: tps issues?

Man, kinda sounds like the EGR isn't closing... If the EGR wasn't closing, the car would start fine and idle while cool, but could start to act up once it got up to temp. But don't take my word for it... I copied the Diagnostic Chart from the 3rd Gen Prelude Bible.



Look at the "Frequent Stalling AFTER Warming up line" ... It lists the EGR as the first thing to check. There is a vacuum hose going to it. I believe the vacuum pulls it open and it closes under the force of the spring inside the EGR. IF you decide to take it of... MAKE SURE you have a replacement gasket handy.

Follow this Matrix and I bet you will find the cause pretty quickly...
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Old 10-11-2014, 10:57 AM
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Re: tps issues?

Thanks for that^ Forreal needed it. But do you know if the 2.1 has an "intake air temp sensor?"
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Old 10-12-2014, 12:12 PM
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Re: tps issues?

EGR gets loaded with soot over time. In the old days (80's) we'd plug the vacuum line with a golf tee and put in premium to stop valve ping. They didn't close after a while and your car's ecu stayed confused whether to add fuel or not so it sputtered like a carberator that needed cleaning.
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Old 10-13-2014, 01:35 AM
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Re: tps issues?

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Originally Posted by 91Quelude View Post
Thanks for that^ Forreal needed it. But do you know if the 2.1 has an "intake air temp sensor?"
Why yes... It does. The troubleshooting matrix is on page 6-162 of the online manual.

You should download that. It's VERY helpful. And searchable by clicking on the titles in the table of contents.

Here is the link to the 3rd Gen resource guides. The link to download the online manual is on this page:

Official 3rd gen Resource Thread

I TOTALLY believe in the "Give a man a fish / Teach a man to fish" philosophy, so I am giving you a fishing pole and telling you where to drop your line!
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Old 10-16-2014, 01:43 PM
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Re: tps issues?

Well if I'm getting any code it's that. One long flash on the ecu. When I turn the car on it runs fine besides idle (I am positive I need to replace my IACV, in the process of doing that so idle I already have figured out). But then when the car warms up it starts to misfire, hesitate, and get poor throttle response. If thats my code, then that would make sense, correct? My mechanic is telling me to look into the map and egr. Unfortunately I'm not a girl that can fish that well and everything I know is from my own research -_-'
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Old 10-16-2014, 06:16 PM
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Re: tps issues?

Well, you are doing well. And I wanted to add that sometimes the MAP Sensors get dirty too, even though they are behind the Air Filter. There is an aerosol spray you can use to clean it. I did that to my Mom's Camry... it was calling out the MAP Sensor as "bad"... I used that spray to clean it and it fixed the issue. That's cheaper than replacing it.

But I am still leaning more towards the EGR acting up.
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Old 10-17-2014, 10:09 AM
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Re: tps issues?

Messed with the MAP last night, not that. And y'know... my n line filter nor my fuel pump sock have been changed. The sock just got blown out fairly well when the pump was replaced. I haven't had a check engine light since replacing my TPS, only this possible code 10. Got it on the rack, and the EGR looks difficult to get to.
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Old 10-17-2014, 01:18 PM
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Re: tps issues?

A Code 10 is the Intake Air Temperature Sensor. That takes part in controlling the fuel delivery. It could cause your car to work irratically. I see that Autozone sells them and has them in stock online for $23. They are calling it an

"Air Charge Temperature Sensor" P/N: SU4034


Here's the Diagram as to where it is and how to see if it is good, before buying a new one!



And here is how to check the voltages on your car to make sure you have the correct Power and Signals:



Let us know if you have any questions. We'll help as much as possible.
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Old 02-21-2015, 09:51 AM
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Re: tps issues?

So I figured the misfire out. After getting many codes, and replacing nearly everything under the hood, it turned out to be a $22 sensor. The "air charge temperature sensor," also known as the intake air temperature sensor. It was the only code I had at one point, and since my car would start perfectly fine then run terribly once it had warmed up, only made sense. It's on the right side of the intake manifold and is fairly easy to get it out and the new one in. Just figured I'd let you guys know, for anyone that needs help as well.
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Old 02-21-2015, 11:03 AM
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Re: tps issues?

Right on. Love it when folks come back and post the solution.

Forums are also research tools as well as chat rooms. So posts like yours quelude help others later.
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welcome to site Carl
...is a golden car fax kinda like a golden ticket? Sure hope willy wonka didn't put any snozberries in your motor.
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Originally Posted by elspectro29 View Post
Only seen the first one, 15 years ago in theaters. Plan on keeping it that way. Get off my lawn.
Quote:
Originally Posted by Lindso View Post
I remember my first thread, asking what a noise was when I got going 110mph.
Pretty much got flamed for driving like a jackass and was told to slow down. And I'll be damned, slowing down fixed it.

God's Not Dead
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Old 06-07-2016, 01:17 PM
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Re: tps issues?

sorry for bringing this thread back to life but I have a 3rd gen and when I slowly give it gas it runs perfectly fine. but when I stab the throttle it misfires and falls pretty much flat on its face until I let off the throttle. I've replaced the alternator, all the spark plugs, as well as the coils and distributor. ive replaced nearly all the vacuum hoses and still nothing works. she has an exhaust leak. does that have to do with it? and also she only uses 5 gallons out of the 15 gallon tank until she starves for gas. the TPS is riveted on so idk how to get it off and replace it. I'm thinking that its related to that but I'm not sure. can anyone help?
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