here we go again!

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here we go again!

Post by streetboy on Thu Aug 22, 2013 10:30 pm

Posted a while back a strange fault with my 993cc. Been fine for ages but playing up again. Engine light comes on and basically starts stuttering and then cutting out. Hard to restart and have to plant throttle pedal on floor. Sometimes if I rev the granny out of it when the light comes on it clears it?

Fault code shows as throttle position sensor? where the hell is it and would this cause the problem?
Any help with this would be much appreciated, done the searches but nothing to match symptoms.
Cheers Mark.

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Re: here we go again!

Post by HighlyJetted on Fri Aug 23, 2013 12:58 am

Symptoms sound perfect for a TPS sensor fault and the error code confirms the fault.

The tps sensor is here on the throttle body assembly at the opposite side to the throttle cable. The TPS tells the ecu what state the throttle is in, e.g. WOT (wide open throttle) = make as much power as possible, closed = try and make engine idle, or in the middle anywhere.



On a 993 they can be very simply tested as it seems they are just some switches, so it triggers when a WOT, and at closed. Should be able to check this. If faulty you may also be able to take the sensor off, pop the cover off it and WD-40 the switches up and keep working them and they make come back to life - maybe.

Here is the test procedure, don't get confused by the pin numbers just look at the pictures of the probes on the connector for each test.





Hope that helps. Wink 
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Re: here we go again!

Post by streetboy on Fri Aug 23, 2013 7:27 pm

Brilliant!!! Very Happy yep that helps a lot Wink 

So armed with your info, resistance test and then trying to clean the contacts up. When they say replace the throttle body I am guessing you cant just change the sensor?

Many thanks again fella.

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Re: here we go again!

Post by streetboy on Fri Aug 23, 2013 7:29 pm

Oh, and its a cb42 so is it the ef42 pins I need?

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Re: here we go again!

Post by HighlyJetted on Fri Aug 23, 2013 8:46 pm

Nahh you can just change the TPS sensor, but if were talking main dealer stupidity rip off they would change the whole throttle body, making a big expensive job of it. 2 Screws holds the TPS on normally on most engines.

EF-41 and EF-42 means "Engine Fuel" Page 41 and Page 42, its just the way the manual is split up.
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Re: here we go again!

Post by streetboy on Fri Aug 23, 2013 9:36 pm

Thanks Fella Wink 

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Re: here we go again!

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