Hey, Im not sure if I'm the only one having this "issue" but when ever i seem to give it the gas my car never seems to wanna go over ~3k rpm's even when im flooring it. I'm not sure if somethings wrong or its just the way it was built. But is there any way to let her get more rpm's per gear? Please help! thank you.

 

Maybe tv cable adjustment?

 

Im sorry? What are TV cables?

 

It's a cable that goes from the throttle body to the transmission. It controls transmission fluid pressure.

 

ok and how exactly do i go about "fixing" or making my rpm's higher per gear. cause when i floor it she only goes to like 2.5k rpms before shifting

 

odd way

 

I'm not saying it will fix it but it's possible and easy to do.

 

Catalytic Converter plugged?

 

ummm, by any chance, have you checked your fuel pressure??? thats just one of the signs of not getting enough fuel.

 

ok, things you need to check. fuel pressure. TBI must have 13 psi. if its under 10, it will affect engine performance. next, cat. although saying it wont go over 3k is alittle more than i feel it would with a clogged cat anyway. my question for you would be, does it rev when not under load? (park/neutral)

im assuming it is revving fine in park or neutral (no engine loads) so my suggestion is to check for vacuum leaks. i've argued this with people before. but as a GM tech, and owning several TBI vehicles, a bad enough vacuum leak will reduce power under load. i had the exact same problem on an 89 suburban that was caused by a vacuum leak the rear quarter of the intake where the head meets the valley. this causes the computer to try to richen the Air/Fuel mixture, but it cant add enough to meet the extra air, causing a lean condition. however, this is an extreme situation of a vacuum leak, although not uncommon, i'd say check your fuel pressure first. this sounds like a lean condition.

are you getting any backfiring? or other conditions?

 

Hey, When shes in park/neutral she can rev as far as i want. So from what ive heard im going to check the fuel pressure and tighten up the tv cable. Any special way of doing these things on the car?

 

i call fuel pressure!! lol, mines did the same thing, changed almost everything you can think of, until i bought a pressure gauge with a shrader valve attachment ($30 on ebay) and saw wtf my car was doing to me. i was able to revvv it as high as i wanted, until it reached temp, it would start to struggle til no more. so things to do...

cheapest route is fuel filter. might be clogged. $15 fix. its on the driverside right in front of the rear wheel. if you havent changed it in a while, id say its that. but fyi, GM is known for shitty fuel systems. especially tbi. so get your hands on a guage and run it from the outlet side of the fuel line, before the entrance to the fuel filter, to see if youre getting enough pressure straight from the pump, with nothing in the way. if you get 13 (or 12) then youre fine. check the filter to see if its clogged. then attach the schrader to the tbi side ..

 

what you need is a gauge that installs in place of the filter. and GM is not known for poor fuel systems any more than any other company. if he has poor fuel pressure, i would bet money it is because of the pump, rather than just the filter. the pumps gm used were great pumps, that were designed to operate quietly. another very common thing i've seen, is the rupper coupling between the pump and line will split in the tank, and so you are losing most of your pressure back into the tank.

to the OP, they make TBI specific fuel pressure gauge adapters that go in place of the filter, im going to link one for you, get a gauge along with it, and have fun. its always a great tool to have. they come with diffent fittings (some are threaded others are quick connect, like a new style fuel rail) so just make sure and get a cheap compatible gauge. http://www.jbtoolsales.com/sg-tool-a...quick-coupler/

 

Maybe I was to hasty with my wording, TBI fuel system lasts a lifetime, but their pumps suck. Better??

Now if you also noticed, I said the cheapest and fasted part to check is the fuel filter. A clogged fuel filter does cause those symptoms. Its 1000 times easier than dropping the tank first. Not counting out what you said though, that hose does rot out and cause the same symptoms. I'm just simply saying check the easy stuff first. But I'm glad we agree its fuel pressure.

 

but there is no sense i him replacing a fuel filter if it wont stop his problem right? no CHECK the filter, but dont replace it until you are SURE that it is the cause. then after finding the cause you can replace it for preventative maintenance. during diagnosis you should never just replace something. you want to keep all the possibly faulty parts there, until you find a possible problem with one. then and only then, replace it.

and on checking the filter, take it off and blow through it. if you can blow semi easily, then it is more than likely not causing a problem.

and something id like to add to checking fuel pressure, if you hook up the gauge and it says 12psi or so at idle, give it a good rev. the pressure should not drop significantly, if it does, the pump is still bad.