Iceyntenn

Hi everyone, New to the board here and I have a problem here I have a 1992 Camaro, 305 V8, TBI and when I start up the car....it runs fine....i let it warm up and then I head off to work....I get about 5 or 6 miles down the road and when I get to a red light, and it turns green and i push the gas, it hesitates, jerks me around and then it gets the gas and accelerates (roughly)...i finally make it to work....get off from work and head home and there is no problem! Anyone got any suggestions...i have heard everything from choke to vac hose to many different things. Can anyone help me? I love my 92 Camaro and need it to work better desperately. Thank you for all your help!

Vader

ICN Tenn,

Welcome Aboard!

What have you done to the car for maintenance? Is the ignition system fresh? Fuel and air filters? Have you done any diagnosis to this point?

Waiting...

Iceyntenn

Ok sorry for so little information....I just recently changed out the pcv valve and grommet, changed the air filter, changed the breather housing and filter (inside the air filter chanmber housing) and needs an oil change (right at 3,000 miles) as for the ignition system...I have owned the car for 3 yrs and havent changed it or had any problems other than a faulty starter solenoid (which i have already taken care of about 6 months or so ago). Also, I have one definite problem I know (since I looked more at it today) there is a broken hose (and here is my terrible description....the hose comes from underneath I think what is called the Thermac? Its a black hose (kinda thick not rubber like) and goes inside the air filter compartment to a solenoid or switch like thing....it was broken so I duct taped it back together) cause I dont know if it would have that much affect on the original problem. Also, I have sprayed some throttle body and Carb Spray (made by Valvoline) into the carburetor and moved the throttle to open the flaps up and sprayed down it as well. I have done this twice recently (once with the engine off) and (once with the engine running). I'm no mechanic, but definitely wanting to understand more about my engine so I can do things myself. I have tools, just dont know much about .305 V8 engines. Thanks for all your help!

squirrelybird

its a 92??? i dont imagine it has a carburator then...your probably referring to the throttle body. im not sure what hose you are describing, but i would say that could definitely cause your problem. also, i would recommend checking or changing the ignition cap/rotor/wires/plugs...i had a similar problem from a couple bad wires, but it will be good to make sure they are fresh anyways. tracing my problem down, i heard quite a few ideas too....most were ignition related or vacuum related.

good luck

Iceyntenn

Thank you...I thought that would be a good idea to do even as just a routine maintenance, but didnt know if it would really be an electrical problem....but anyway...the plugs were changed about a year ago, so it really is time to do it and the wires I have never changed in 3 yrs ( i know thats terrible, but at least honest). So thanks for all the input!

Vader

Icy,

Let's summarize a bit.

You have a '92 Camaro 305. By your desription, it has a TBI (Throtle Body Injection) fuel system. There were no carburetors on our cars after 1987 (at least not the domestic ones).

You recently changed the PCV, some filters, and are fairly current on oil and ignition maintenance. Just to be sure, it would be a good idea to test or replace the plug wires, and inspect or replace the distributor cap and rotor. Don't be too concerned about the age of your ignition wires. Good ones can last 100,000 miles if properly installed and not damaged.

The duct tape on the Thermac/EFE hose was a good solution. A little leakage on that system is not an issue. If you ever want to, you can get a replacement paper/foil tube at most auto parts stores for a few bucks. However, any leakage at vacuum lines can be a problem, so inspecting them for splits, cracks, and deterioration would be a good idea. Don't forget to inspect the large vacuum lines to the power brake booster and PCV valve as well.

Are you seeing the "Service Engine" light on the dash while you are driving? If so, you can retrieve whatever error codes are being stored and have a clue to the problem.

How is the idle RPM through all of this? The TBI system uses a small stepper motor to control the amount of idle air admitted to the engine (the IAC motor). Any dirt or blockage in this system can cause poor idle and low RPM response.

Other possibilities are problems with the EGR valve, other ignition components, fuel pressure, and engien sensors and controls, but you should make sure the main ignition components are sound before you start digging too much deeper.

squirrelybird

right...listen to vader...he knows his stuff.

if you are gonna check the ignition wires, DONT just visually inspect them at night and look for jumping sparks, like some will recommend. i did, and mine looked fine. they were not brittle either. check them with a multimeter for resistance. when i did that, i found 2 bad wires. i forgot how much resistance is normal...something like 4000/ft...ask vader! haha

Iceyntenn

Thanks so much for all that helpful info...im off work tomorrow so step by step im going to go out there and start at the top and go from there. I wondered about that hose from the Thermac...it always seems when I start the car up in the morning and let it warmup (idle down to 500) and NOT using the defroster/heat....it doesnt act up....but the minute I just start it up and go and then torun the heat on...it hesitates in a matter of miles. And like I said....when I come home from work...it doesnt do it....and I always wondered if maybe it was the fuel filter being clogged or something. Well anyway, thanks again....and yes it is a TBI system...im so sorry for not being so detailed. But anyway....Im off to get some parts i guess and see what else i need for my project tomorrow...I hope to get my 92 running like she used to all the time....perrrrfect.

Iceyntenn

I am seeing the Check Engine Light come on....like if i go over a 50 miles trip....at sometime it will come on....only to not come back on after i turn it off and leave it for a few hours. Its strange...and I do need to get that tool to let me see what the error code is....cause i have a shop manual for my car that has the codes in it.

squirrelybird

you dont need the scan tool to pull stored codes....all you need is a paperclip.

i could try to explain it, but it would better for both of us if you saw some previous posts on it..... just search the archives....search for "ALDL" you should find plenty.