Toyota Repair Problems? Ask a Mechanic for Answers ASAP
I think you just described them. Yes, it will make the vehicle studder and miss as it will also cause low power, bad gas MPG's etc.
ok is there any way to test it
Do you have an oscilloscope?
no i dont
my truck it runs gd when sitting in neutral. and u rev it up it ok . but when u put it in gear and give it gas fast it studders and seems to miss. but if u ease on the gas it runs ok. seems to only do it when u need power to move would that be a mass air flow sensor going bad
This is a vane type MAF and has a door that will move along a resister. What happens is that the resister will get a break or gap in it and when the needle moves along it, the sinal to the computer will drop out causing these symptoms. An oscillioscope would allow you to see the break or weak point via a scanned graphed. The MAF signal is very integral to the engine performance and is needed to 'see' how much air is entering the engine for Fuel ratio. That is also why Toyota switched to a non-contact type MAF.
so that would cause my problem
Yes it very well could.
ok can u tell me how to put a tps sensor on i bought a new one and when i put it on it runs bad
Can the TPS be adjusted on this 3.0L?
the screw holes are slotted so i would think so
The best way is to install the new one in about the same position as the last but before removing the old one, take a DVOM (multimeter) and perform a resistance check of the sensor. This way you can fine tune the new one to the same resistance as the old one and the engine will have the same performance.
i put it on plug it in and when u give it a lil gas it cuts out bad
when i got truck it didnt have one on it the guy was running it with out it
Thats a bad sign that he was running this truck without a TPS installed. Have you had a repair shop look at this yet?
running without one wut would it do
I would think that it would be best to have a professional repair shop just set up the TPS and then go from there on the continued Diagnosis.
running without one wut would it do Yes, absolutely!
wut would it cause for prob
Exactly the problems you are having. The TPS and MAF will work together for the Computer to run the engine. It would be like you trying to play football blindfolded.
ok so say maf is bad would that make it hard to set tps
They are independant.
so when i set tps that may help maf to work right
would running without tps cause maf to go bad
ok do they set tps buy a computer
By DVOM (multimeter)
i have a mutimeter is there a way i can adjust it
Have you ever done this type repair before?
i put tps on before but never had to adjust one like this on
This may not make much sense and it would be best to let a professional repair shop you trust perform this installation but what you will do is set your DVOM to resistance and back probe the TPS at E2 and VTA and set the resistance to 0.2 and 0.8 at closed throttle and 3.3 and 10 Ohms at wide open throttle.
so thats the bottom terminal and third terminal right
put multimeter to the place where u out pos to neg and it beeps to test that
Set it without the connector installed, just by itself.
yea mine closed starts at .44
what about with it at full throttle?
it deflects out
Thats not right. It should be 3.3 to 10 Ohms.
ok i did it wrong sorry it is .2 closed open 5,3
Then it is Ohming out as good and will want to replace the MAF.
are they expensive
I dont know for sure as I havn't priced one out in awhile but please only use a Toyota MAF from a Dealer as aftermarket ones are very untrust worthy. Thats why they are much cheaper (from memory).
ok would one from a junk yard work
That would be an option yes.
ok thank you for ur help
ok i got it set now when i give it a lil gas it surges bad what cuases that
closed it set at .2 full open is 4.2
would maf be causing that
it cuts out at 1500