Badplasma

ok SO as I drive down the road if I barely press the gas pedal I accelerate...if I stomp on it...it acts like its out of gas.....

Here is what I have done....I have changed all the spark plug wires....I have replaced the air filter....I have replaced the fuel filter...and I have ran a few things of injector cleaner...I can get up to speed..luckily the max speed between home and work is 50 mph...

BUT...sometimes it run normal as if there is no problem..

I am at a loss as to what to check next...Ive talked to two repair shops and have done what they suggested..wires..filters..

Am I missing something?

bone collector

what motor? 4 cyl or 6 cyl??is the check engine light on? sounds like a vacuum leak to me but really hard to tell without more details

Badplasma

Its a V6 the check engine light is not on..

bone collector

http://personal.utulsa.edu/~nathan-buchanan/93fsm/

go thru and read this carefully. this should help.

mr8a

Had a similar prob, ended up being the mass air flow sensor on mine

bone collector

not to be to technical, but the 90 3.0 has a VAFM ( vane air flow meter) not an MAF ( Mass Air Flow) same idea between the components but they are way different. and yes the VAFM can cause problems similar to what you are describing

Edionne13

I've had your issue it was my vafm for me. Mines the 3.slow like its out of gas has no power but alone sudden it kicks in

Badplasma

I may have tracked it down to a loose spark plug wire at the destibutor cap? Question is would that cause that or is it a fluk that I think that?

Badplasma

I am restarting this thread as I was wrong about the loose spark plug wire....I have changed the VAFM put in a new one..there still is no check engine light on...some days the truck runs just fine no issues...but then it seems the next time I get into it the issue is back...could there be an issue with the EGR system as I have read else where? Please Help....

bone collector

carefully go through the link I posted above. it takes a little work and hunting but it will guide you the answer. if the afm didn't fix it I would test the 02 sensor and the tps. both are problematic

bone collector

testing the components being the key. not just blindly replacing parts and hoping for the best

Badplasma

Really hmm maybe if I knew where to start I wouldn't have asked... And yes Iooked over the service manual... I don't have a large shop with every tool known to man... In fact a have. Screw drive and. A socket set... And looking for same adive not some smartass response from someone that obviously know the answer and can better advise me..

bone collector

I don't know the answer. I cant tell you the answer without having your truck in front of me. basically to test everything you need a 15 dollar voltmeter. since you think I am being a smart ass I will try to change your mind.


o2
http://personal.utulsa.edu/~nathan-b...01heatedox.pdf

egr test
http://personal.utulsa.edu/~nathan-b...00egrgaste.pdf

tps test
http://personal.utulsa.edu/~nathan-b...93throttle.pdf

now that I have spoon fed you. get some tools and get your hands dirty. or don't ask for more help. come back with some results, not complaints

Badplasma

I must apolagize I realize your trying to help..and I know you cant just give me an answer..again sorry or my smartass comment...

Badplasma

wouldnt if the O2 senor was causing the problem wouldnt the check engine light come on?

vegasrunner

is your c.e.l burnt out? i have similar problems sometimes but mine is from my knock sensor and when a wire for k.s fails its retards itself thru the ecm i agree test vafm,tps,o2 and knock sensor with voltmeter and see what you got i did it and all passed besides k.s and also is your fuel pressure good? fuel filter as well?

SpydeyLazo4x4

Hey Badplasma,
I recently joined the forum in hopes of obtaining some assistance identifying what the hell is wrong with my rig! lol. I'll be honest, I hardly know ˟˟˟˟ about auto-mechanics. I'm young. I grew up without Dad or any auto-knowledgeable influences or relatives. So! I'm stuck learning everything on my own.

ANYWAY! I came across this thread noticing that your problem sounds VERY similar, if not identical to mine.
I own a 1992 Toyota 4Runner 3.0 Liter V6. I've had the rig for a year now and in the past 3 months or so, I've noticed a steady decline in power/acceleration. Didn't pay much mind to it at first, until it began getting increasingly worse. Now it is at the point where the acceleration/power is practically non-existent! And if I remember correctly, I don't believe my check engine light is on either. The rig fires up okay, but no matter how much gas I apply, the damn thing barely budges! Even flooring it, it only goes maybe 5mph! When my foot's on the gas it just putts and blubbs horribly, slooooowly creeping along, sounding as if it'll die on me at any moment.
If the engine has been running for about 20 mins or so, it seems to SLIGHTLY get better, but not enough to really make a difference...I can get up to maybe 10mph now. But the only way it will even accelerate is if I(like you mentioned) ease up off the gas substantially. Lightly tapping on the gas seems to get a few small kicks at times too. On the road, I have to gas it very lightly, slowly applying pressure gradually. It takes FOREVER just to get up to even 30-35mph....And if I hit a red light, or have to come to a stop...Well, I'm ˟˟˟˟ed.

I've had several people take a look at it, but nobody has been able to identify the issue nor make any effective changes. (All I've gotten is numerous random guesses of what the problem is)
So far, the only thing I've done to try and solve this issue is replace the fuel filter, check wires, and tweaked some things under the hood. I am VERY limited to what I can try, as(like I said before) I hardly know ˟˟˟˟ about vehicles! ...I know, stupid right? lol
Sorry for the novel...Any help would be GREATLY appreciated. I am out of ideas. :/

Badplasma

I'll let you know if I find a solution..

Badplasma

So I've tested all the things that was suggested to me and those all tested just fine... Still not working... When it's acting up I get a strong smell of gas... Does that make sense?

Badplasma

Im trying to bring this back out of the dead on here...could the ECM be part of the problem with this?