error codes
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
which engine I4 or 3L V6?
how's it running?
MAPs seldom fail...check that the MAP electrical connector is pushed in and no corrosion on contacts
TPS do wear out and fail....check electrical connector for corrosion and tightly plugged in
clear the codes by disconnecting the neg - batt lead for 5 minutes to clear the codes and KAM memory in ECU.
run for a week and see if codes come back on
how's it running?
MAPs seldom fail...check that the MAP electrical connector is pushed in and no corrosion on contacts
TPS do wear out and fail....check electrical connector for corrosion and tightly plugged in
clear the codes by disconnecting the neg - batt lead for 5 minutes to clear the codes and KAM memory in ECU.
run for a week and see if codes come back on
Thread Starter
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Junior User
Joined: Nov 2005
Posts: 61
Likes: 0
From: Abbotsford BC
3L v6
It was running like crap a while ago. It was idling irratically (reving out of control and wouldn't kick down) Hasn't done that in a while and seems to run decently now, but the engine light turns on and off while driving.
Will try what you suggest. Thanks.
It was running like crap a while ago. It was idling irratically (reving out of control and wouldn't kick down) Hasn't done that in a while and seems to run decently now, but the engine light turns on and off while driving.
Will try what you suggest. Thanks.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
revving out of control is the TPS, dangerous
REPLACE NOW for safety
http://fordfuelinjection.com/?p=30
also check and make sure the vacuum line to the MAP is on and not leaking on both ends
REPLACE NOW for safety
http://fordfuelinjection.com/?p=30
also check and make sure the vacuum line to the MAP is on and not leaking on both ends
Last edited by 96_4wdr; Jul 24, 2007 at 06:54 PM.
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
I would clean the MAF sensor with TB or electrical parts cleaner. Then just check the connections and make sure they are snug. As for the TPS, if the TPS ever triggers a code, check the wiring and connectors to make sure they are good and that there is no corrosion. If a visual inspection comes out ok, get a new TPS. They are not expensive, and they could be triggering the MAF code as well (very unlikely, but still possible.)
We had an e-350 where the TPS went out, and it started to show signs that it wasn't responding well with the throttle in certain positions. To get a response, you either had to use less throttle or more, since there seemed to be a dead spot. When it triggered the code the following day, the van was nearly undriveable. Trying to get it to the parts store was a challenge. It took nearly 30 seconds to get to the 40 mpg speed limit. The sensor was fairly easy to replace. I compared the new ones resistance to the old one right there in the store. The resistance at idle on the old part was greater than the resistance at WOT on the new one. At WOT on the old one, the resistance was about 10 times greater than the WOT resistance on the new part. And there was a dead spot where the meter went out of range.
We had an e-350 where the TPS went out, and it started to show signs that it wasn't responding well with the throttle in certain positions. To get a response, you either had to use less throttle or more, since there seemed to be a dead spot. When it triggered the code the following day, the van was nearly undriveable. Trying to get it to the parts store was a challenge. It took nearly 30 seconds to get to the 40 mpg speed limit. The sensor was fairly easy to replace. I compared the new ones resistance to the old one right there in the store. The resistance at idle on the old part was greater than the resistance at WOT on the new one. At WOT on the old one, the resistance was about 10 times greater than the WOT resistance on the new part. And there was a dead spot where the meter went out of range.
Former ******
Joined: Nov 2004
Posts: 4,901
Likes: 2
From: Salt Lake City, Utah
O, my apologies, a MAP sensor is different than a MAF sensor. A MAP sensor should not be cleaned. It either works or it doesn't. It measures the vacuum in the intake manifold to determine information about engine load, and when combined with the intake temp sensor and coolant temp sensor, it can give good information about air density.
