02/89yota

was "tuning" the tps, now she wont start, the other day, I had her started and running, but when I went to apply more than half throttle, the truck sputtered and bogged.... I am going to bite the bullet and replace the EGR valve/pipe/sensor and pray to jebus that fixes this problem.. otherwise I am completely stumped

Mandy Tuning

sound low fuel pressure or a bad maf

02/89yota

and how do I go about checking the MAF, I know the fuel pressure is good, as I have replaced everything and our mechanic who is also a family friend, came over and checked everything out, said it was all good

4Crawler

iTrader: (3)

Could be missing vacuum to the fuel pressure regulator:
- http://www.4crawler.com/4x4/CheapTri...ine_Pix/8.html

Without that, you get full fuel pressure at low engine loads and that causes too much fuel to be injected and the engine sputters and bogs down.

Also, could be EGR valve plumbing issues. If the EGR opens when it is not supposed to, same sort of problems.

Air flow meter testing (your engine has that, not a Mass Air Flow/MAF sensor):
- http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml

02/89yota

I am going to check everything today, I am supposed to be receiving my pipe,valve and sensor today... ill report back and let everyone know how it goes

Mandy Tuning

the flow of the egr is so small it will affect the idle if open when not supposed,over idle it will not make your engine bog only some slight hesitation,did your mechanic use a fuel press gauge? cause if he doesnt know how to test a "afm" that is a simple potentiometer i will trust on him only for a chasis lube.

westjohns yota

did you do a seafoam treatment? might be clogged, also check your cat? might be clogged also

02/89yota

so I got it started, and here is the video, you can hear some popping towards the end, if anyone can help out with this, I would so appreciative!

http://s1112.photobucket.com/albums/...t=VID00012.mp4

JamesD

Either the timing is off or your starving for fuel. Have you changed the fuel filter? It is bolted against the block underneath the intake. That pop sound like it starving for fuel and backfiring through the intake meaning it is running super lean. Make sure you do not have old gas in the tank.

James

02/89yota

Fuel filter, pump etc were replaced.. I will go get some new gas and drain the old stuff through the drain bolt on the tank


Anyone got any other ideas?

angrydogtattoo

so let me ask...was it the ground wire or the TPS that was causing the no start?

4Crawler

iTrader: (3)

Might also check the intake plumbing for holes or cracks in the rubber bellows sections. Could have an air leak in that area letting in unmetered air. That can cause backfiring as well and can make the engine otherwise run bad. And don't just look at the intake and say it "looks OK". Pull it apart and closely inspect the rubber sections for cracks and holes as you flex them.

02/89yota

would that being cracked or having holes cause it to run like gummy bears too? I have an option out of this motor too

JamesD

Yes. Any holes or rips in the tube between the throttle body and the air flow meter will make the truck run like crap.

James

02/89yota

ok an best way to check it, is to just pull it off and look at it?

4Crawler

iTrader: (3)

Yes, take off and use a light on the outside and flex and turn the rubber sections and see if any light can be seen inside. Cracks usually form at the base of the folds. But you need to flex the rubber to cause any crack to open up so you can see it.

02/89yota

Didnt see any cracks, but when taking off the air intake hoses by the airbox (maf?) They were auper dirty and had black residue....

02/89yota

to the top

02/89yota

Again.....

02/89yota

So got the truck running, but anything more than half throttle it sputters and acts like it wants to die, im trying my hardest to get this done NOW so I can stop driving the girls car...

I have replaced just about everything, what else would cause this problem?

Tired of dealing with this damn thing.