here is the deal guys, while driving home one the highway i got a check engine light, a while later it went out, then it stayed on untill i found my self putting more and more pedal in to keep up speed. i did this untill i was hardly moving the tach at 1,900 and my foot almost all the way to the floor. it smelled really rich.i got it towed home. when i was playen around with it, if i hit the gas quick then let off quick it would die. and it would take a hole lot of pedal to get up in RPM. it is a 91 305 with a 5-speed the only thing i have done to it is the K&N and alittle timing.

any help would be apreaciated.
Andy

 

Sounds like a dead fuel pump. I would have your feed line pressue checked. If tat is fine you could have arcing plug wires or a clogged cat.

 

What is your battery voltage? Is your charging system keeping the battery at or above 13v. my alt went out and as the battery was draining the engine was too, it wouldn't rev up or idle very well. The battery was only at 8v and it really messed with everything. New alt cured the problem. Not saying thats your problem but it's worth checking.

Steve

 

the batt. is being charged. its got a new alt already.

would the fuel pump give me a rich smell and a SES light that is kind of intermintent?

 

check all the gaskets on the upper part of your TBI (fuel rails, injectors, etc)...if one of those is out, and you got fuel leaking everywhere, it will make it run rich enough to die, and i think it might also set off an SES. that's my guess, though i doubt that one of those gaskets would suddenly fall apart.

 

i was having the same problem when my MAP vacuum line melted on the intake manifold. Disconnect the MAP sensor and put the car into LIMP MODE and see how the car runs. Also check the vacuum line to the MAP and pull your SES CODE. After that let us know whats up.

 

i just redid the intake manifold, and all TBI gaskets. still not working. also did a new egr. i will check the map and see what happens... what about the 02 sensor?

 

What code is your car throwing?

 

May be a clogged cat.

 

i dont have a code puller, where can i go to get them pulled or how much $ is one of those things?

 

stick a wire or paper clip connecting ports A and B on the ALDL connector (upper right 2 ports), then turn the ignition to the ON position, code 12 will blink 3 times then it will blink your SES codes. Those OBDI code readers are a joke, it is basically a fancy paper clip, LOL

 

ok i got the codes from the wire method in the a and b ports but it just kept blinking 12. it is still not runnen right. so far i have redone the intake manifold gaskets, egr valve, and took out the cat. replaced with just a pipe. it idles real rough but seems to have a better time getting up in rpm.

again its a 91rs 5spd i have the ult TBI, k&n, new wires, plugs and the cap have some 3000 miles on them and i have bumped the timing up a bit.

 

Your coil could be going south. What condition are your plug wires in? Have you checked the resistance on those yet? What did you say your fuel pressure was at?

 

i figured it out thanks for your help guys. it was my dumb a$$ that forgot the second screw on the cap. so the cap was not sitting right and not hitting right. so i replaced that and redid the timing to 4*. runs nice now... sence i cut out the cat i would like a new one but want a high flow that will hook up to my stock tubes. any ideas for that?

thanks again.

 

Check out the exhaust board for carsound cats. They make various sizes that are really cheap. There really isn't any gains by adding a high flow cat to a stock 2.25" exhaust.

 

Could be a plugged exaust. Those are some of the things a car will do if the cat has melted down. Stuck a holley 650 on a car and within minutes it had melted down teh cat. Didnt know about it until it was floored. Car wouldnt go over 1800 rpms. You can see it with a vacuum gauge. Rev the motor, slam the throttle shut, and the needle wont snap back right away.

 

No IAC when the voltage is that low. IIRC if it gets too low the ecm shuts the motor down alltogether.

 

I had this same problem last December. It turned out to be a clogged CAT. Used my Sawzall to cut a big chunk out of the pipe right before the cat and it ran perfectly ( a little loud though. )