88 f150 problem
#1
88 f150 problem
I have a 1988 F-150 XLT with the 300-6 engine.
Just recently my truck has started to have a low idle bog and a slight miss fire, I've replaced the throttle position sensor, map sensor and idle air control valve and it still seems to run a little rough on acceleration. I've cleaned the throttle body also. Any ideas that could help?
Just recently my truck has started to have a low idle bog and a slight miss fire, I've replaced the throttle position sensor, map sensor and idle air control valve and it still seems to run a little rough on acceleration. I've cleaned the throttle body also. Any ideas that could help?
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#8
That's not a OBD1 code. OBD1 codes in 1988 are all 2 digits.
http://www.thorssell.net/hbook/eectest.html
http://www.thorssell.net/hbook/2digit.html
Instead of using a meter, you can count flashes of the check engine light, you just need a jumper wire.
*DO* a compression test.
Did you put Techron in the gas? If not, do so. If so, how many miles have you driven it since you put it in and how much did you put in?
http://www.thorssell.net/hbook/eectest.html
http://www.thorssell.net/hbook/2digit.html
Instead of using a meter, you can count flashes of the check engine light, you just need a jumper wire.
*DO* a compression test.
Did you put Techron in the gas? If not, do so. If so, how many miles have you driven it since you put it in and how much did you put in?
#9
Roughly, the throttle position sensor is out of range, the egr is not opening, most of the numbers are repeated codes so you need to disconnect the battery for an hour and reset the system. I would start by looking for any vacuum leaks and small rubber hoses that are cracked or aged. Don't find any leaks, compression check will tell the tale.
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