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Discussion Starter · #1 ·
Hello everyone,

I've recently been having problems with my escort and have got the obd code p0113. I'm quite inexperienced with cars but I'm trying to learn more and have been doing my research about it. I've checked the temperature reading on the IAT through my obd reader and it is telling me C 37, is this correct even when the temperature outside is C 6? I'm sure that I this replaced. Do I have to replace the MAF to make the repair?
 

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Intake air temps will be significantly higher on an idling vehicle due to heat soak. 37C sounds spot on if the vehicle is warned up and idling, if the car is stone cold, not sitting in the sun or anything with key on engine off then obviously its reading is off.

The next step would be to verify the problem, such as checking the resistance of the sensor (not sure if data is available for what resistance it should read at various temperatures), or if you have extra resistance somewhere else in the circuit.

 

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Discussion Starter · #3 ·
I have taken your advice and watched the video. I went back and did a reading on the IAT with the ignition on engine off and the IAT was reading 7C which is an accurate reading with the car being cold and the temperature outside being 6C. I then unplugged the IAT while the ignition was on and it defaulted to lowest degree. So I marked that off, I then tested the wires connected to the IAT and power circuit is reading 4.4 volts while the ground circuit is reading 0. I'm not sure what the problem could be, is there something that I'm not testing for?
 

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What does the IAT read when the engine is running, at idle and driving? What do you read on the wires while the engine is running?

It seems like the IAT sensor itself is working if it is giving you an accurate reading KOEO.
 

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Discussion Starter · #5 ·
I just checked the readings and here is what I found. Another obd code popped up too and the engine light as well.
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P1000 will occur any time the codes are cleared, or the battery is disconnected/dies or otherwise the PCM loses its memory.

That p0113 code definitely can pop up if you disconnected the IAT with the key on or engine running. Is it possible there's nothing wrong with the IAT at all?
 

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Throttle position is at 20% on your pids, nothing else looked out of the ordinary to me at least at a glance, but I can't really give you direction based off of codes and static data.

This is just a guess, but is your throttle body so clogged up with something that it's holding it open a bit?
 

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Did you wipe out the throttle body as well, down behind the butterfly and such? I once dealt with an F-150 that would still stall out, I had sprayed TB cleaner in there, but it would stall out. Once I actually got in there and wiped all the gunk out it would no longer stall. Didn't have to be too aggressive with it, just let the cleaner do most of the work.

Again, this is only a guess as to what could be causing your stalling, that was the only thing that looked like it might be abnormal, but again it's static data.
 

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If you're getting a code for the upstream oxygen sensor, then start by replacing that. Downstream sensor will have no impact on engine performance.

Vacuum readings good?
Only other time I've had an idle stall on my 2nd Gen 'scort (OBD-I) was running on a Purolator brand air filter, causing the MAF sensor to get dirty. Once I cleaned the MAF sensor wire things were good.
 

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If you're getting a code for the upstream oxygen sensor, then start by replacing that. Downstream sensor will have no impact on engine performance.

Vacuum readings good?
Only other time I've had an idle stall on my 2nd Gen 'scort (OBD-I) was running on a Purolator brand air filter, causing the MAF sensor to get dirty. Once I cleaned the MAF sensor wire things were good.
Fuel trims looked good based on the images beater posted, but maybe Beater can clarify if the trims are high at idle.

O2 sensor seems to be responding based on those images as well, not sure where you got an o2 sensor code from?

Dirty MAF could definitely do it, though I think that MAF reading might be right. Beater if you rev your engine what do your fuel trims and MAF read off idle?
 
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