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p0101 p0103 99 s10 4.3 missing
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timszr2
Novice
Oct 17, 2006, 4:04 PM
Post #1 of 2
(4307 views)
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p0101 p0103 99 s10 4.3 missing
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 truck misses when first starting i know 101s mass air flow think replacing it will make missing quite replaced plugs wires fuelfilter coolant temp sensor crank sensor
99 zr2
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DanD
Veteran
/ Moderator
Oct 18, 2006, 3:51 AM
Post #2 of 2
(4300 views)
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Re: p0101 p0103 99 s10 4.3 missing
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(I posted this reply in the general forum as well.)
Yes a MAF can cause the engine to run poorly but just because the computer has set MAF codes doesn’t mean that it is the MAF sensor for certain.
For example the computer uses the TPS (throttle position sensor) as a way of checking the MAF. The computer knows that a certain TPS value the MAF sensor should be at a certain frequency. Now if the TPS is out of range but not so far out to set its own code the computer may trigger the codes that you are receiving?
The test procedure for these codes are fairly lengthy and require the use of a scan tool to read data or the computers interpretation of data coming from the MAF and TPS. Without the scanner you will not be able to confirm some of the steps of the procedure.
The things you could be checking for are is there any blockage at the MAF inlet and that the bellows between the MAF and the throttle is intact and not allowing false air to enter the engine.
If they are ok and you want to throw the dice and put a sensor on the truck you’ve got a 50/50 chance of it being the problem.
Dan.
Canadian "EH"
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