Yesterday I was driving my car aftre 30 mins of driving I gave it gas to pass a slow car drving in the fast lane. An amazing thing happend it started desieling bad. Pulled codes off the ECM got a 32 that is the EGR what a surprise. had that since the motor was rebuilt. and A 41 which is cam sensor or tach error. Here is the specs on the car:
1984 Camaro Z28
Reman 305 4000 miles
Rebuilt Carb 200 miles
New Plug wires
New plugs
New Cap and Rotor
New Coil.
so does my 97 silverado but if the knock retard is off more than + - 2* degrees it will through a cam position code. the cam sensor is located in the distributor clock wise or counter clock wise it will change knock retard.
do you see the connection for the cam position sensor.
oh and dieseling is cause when the engine's timing is off.
Yea that problem was fixed and the car was running great. Except for the ticking which is an exhaust leak. I am in the proces of getting a set of headers for it now. The EGR though seems it was never hooked up. and the MAP sensor has no other place to hook it up too. The only hose is running from there to the back of the intake manifold.
How was it running great without the MAP sensor hooked up?
If you put headers on a computer controlled carbed/timed engine, it will not run well afterward. And you will not be able to adjust the air/fuel mixture.
K....So I will have to just replace the gasket for the exshuast manifolds..... It was running great just pren..... no desieling nothing..... Getting great gas milage and everything. Then boom I hit the gas and it was desieling
By dieseling I assume you mean what most people would call pinging or spark knock.
The computer controls the timing advance on a 1984, not the base timing. The base timing could be wrong.
I don't have a manual in front of me but I never saw a 1984 Chevy V8 with a separate cam sensor.
A 1984 and a 1997 are worlds apart in how the various systems are controlled by the computer.
Spark knock is caused by high combustion chamber temperature and timing that's to far advanced, among other things. A malfunctioning EGR could be the cause, but if the cars been running ok that's not the first thing I'd look at. Check the timing like 383silverado suggested, it's an obvious possible cause of the knocking. Another is an engine that's running too hot or too lean. Maybe you got a tankful of bad gas.
Knocking (also called pinking or pinging)— colloquially detonation—in internal combustion engines occurs when air/fuel mixture in the cylinder detonates or ignites prior to the timed pre-set conditions in the engine's cylinder(s). The fuel-air charge is suppose to be ignited by the spark plug only, and at a precise time in the piston's stroke cycle designed for the engine. In engine knocking the smooth burning of the fuel-air mixture is interrupted by the unburned mixture in the combustion chamber detonating before cylinder's piston has reached the designed position. The design intent of the combustion process ceases, because of the explosion, before the optimum moment for the four-stroke cycle. The resulting shockwave reverberates in the combustion chamber, creating a characteristic metallic "pinging" sound, and pressures increase catastrophically. It can range from hardly noticeable to complete engine destruction.
It was running alittle warmer then normal the last week after I put the rebuilt carb on it. Would that be a sign of being to lean? Should I richin it up sum. Timing I will through a light on it to see how off it is.
It was running alittle warmer then normal the last week after I put the rebuilt carb on it. Would that be a sign of being to lean? Should I richin it up sum.
that is a very good sign that you are running lean if thats all you did was rebuilt the carb. richen it up and see what happens. how many jet sizes did you go down?
that is a very good sign that you are running lean if thats all you did was rebuilt the carb. richen it up and see what happens. how many jet sizes did you go down?
before you start messing with the carb pull the plugs and check what color they are black your running rich/ white your running lean tanish/brown you good.
Dieseling is not pinging or knocking it is often called engine "run-on" and happens when the engine is turned OFF!http://en.wikipedia.org/wiki/Dieseling
Spark knock or detionation is pre-ignition caused by the combustion temps being to high and the air fuel mixture firing before the spark plug fires.http://www.misterfixit.com/deton.htm
Ritchen your system up, should take care of your "dieseling" problem.
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