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Old 02-08-2010, 01:22 AM
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Default 90% sure it's the throttle position sensor...

I have a 94 Golf, I bought it 2 years ago, in horrible condition (and paid way more than I should have but I digress.) We rebuilt the engine, also installed headers, new fuel injectors, spark plugs and wires, distributor cap, fuel pump, o2 sensor, and probably more.
Also it had an awful time idling, it wouldn't at all. So eventually I figured out to plug the hose that goes back to the IAC, and plug and disconnect the IAC, and now it idles fine, after figuring out they took out the unit entirely in future models anyways.

SO the only problem it seems to have now is whenever I have the pedal pushed between like 0% and 40% depressed (0% = Not depressed, 100% = to the floor) it starts missing like crazy, and it's not very responsive when I punch it. If I push the pedal past that all the way to flooring, it runs very smoothly, and this is regardless of what RPM, gear, or speed it's running.

So I'm thinking it's the Throttle positioning sensor, I'm going to clean it tomorrow (I need the tool to remove rusted stripped screws) and I'll see how it goes.

What are your ideas on it?
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Old 02-08-2010, 04:55 AM
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yep, throttle is junk..my 96 golf did the same...replace it, and you should be good
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Old 02-08-2010, 06:09 PM
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Originally Posted by kupo365 View Post
I have a 94 Golf, I bought it 2 years ago, in horrible condition (and paid way more than I should have but I digress.) We rebuilt the engine, also installed headers, new fuel injectors, spark plugs and wires, distributor cap, fuel pump, o2 sensor, and probably more.
Also it had an awful time idling, it wouldn't at all. So eventually I figured out to plug the hose that goes back to the IAC, and plug and disconnect the IAC, and now it idles fine, after figuring out they took out the unit entirely in future models anyways.

SO the only problem it seems to have now is whenever I have the pedal pushed between like 0% and 40% depressed (0% = Not depressed, 100% = to the floor) it starts missing like crazy, and it's not very responsive when I punch it. If I push the pedal past that all the way to flooring, it runs very smoothly, and this is regardless of what RPM, gear, or speed it's running.

So I'm thinking it's the Throttle positioning sensor, I'm going to clean it tomorrow (I need the tool to remove rusted stripped screws) and I'll see how it goes.

What are your ideas on it?
You cant clean the TPS, when you pull it out you will see why. There is nothing to clean. It doesnt come into contact with all the gunk.
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Old 02-08-2010, 08:25 PM
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You cant clean the TPS, when you pull it out you will see why. There is nothing to clean. It doesnt come into contact with all the gunk.
Yeah, I found that out, haha, but I found one on ebay for $28, so it'll be here in a couple of days, we'll see how that goes.
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Old 02-09-2010, 09:37 AM
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while your at it i would change the temp coolant sensor as well coz the failure of this gives the same symptoms as ur describing
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Old 03-15-2010, 08:23 PM
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while your at it i would change the temp coolant sensor as well coz the failure of this gives the same symptoms as ur describing
The thermostat? or is that something else
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Old 03-15-2010, 11:57 PM
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They are 2 seperate things. Look at the sticky on the top of MK3 forum to find your coolant temperature sensor. Your thermostat is near bottom of engine mounted on water pump.
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