I have a 89 toyota efi it ran fine for about a week now it wont run for **** idels fine but when u rev it it cuts out or doesnt rev but just a lil bit i put a new tps on it and it didnt wanna hardly run at all ran better with old one put new cap rotor button has new wires plugs look fine dont know if its a vaccume line or just tps could be out of range or whatever. could it be the fuel filter clogged? or fuel pump going bad? i put a ecu in it and ran great for about 15 mins then started again im lost if anyone has encountered this befor please let me know or anyinput would greatly be helpful

 

Here you go: http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

Good luck!

 

Tps will show itself and make the idle go up and down usaully. If the check engine light is on, check the codes. Could be a coil pack going bad. Losing spark through a plug wire. Could be a bad ground strap, sometimes the ignighter module will start going bad. Which is the box on the side of the coil. I had that one happen to me after it rained for a while. I have only the metal inner fenders and it starting sorting out after many times of being soked.

 

Are you running platinum plugs?

 

Change the fuel filter!!!! Do that first for sure. i had the excat same problem on my 92 4runner. would idle all day long but as soon as it wnet in gear or reved it up it would bog out and/or stall. I changed the fuel filter and it ran like a dream ever since. If the new filter doesnt work then check the fuel pressure... that will tell u if your pump is bad...

Let us know how it goes!

 

a guy told me it was my mass air he had same problem but there hard to find what u all think

 

You might try testing your fuel pump pressure, or even testing your O2 sensor. If it's an O2 sensor it will sometimes go away when you clear the codes but then just come right back. The other thing if it is a mass air flow sensor you can get some cleaner specifically for it and that sometimes does the trick. Good luck.

 

if u do need a maf sensor i have one.