I have a 1996 Chevy Blazer 4.3l Vortec motor. I have replaced several sensors and it keeps blowing the camshaft sensor. What could be causing this? Could it be out of time?
He told me the other day that the car drove fine for about forty minutes before it started acting up. He found water in the fuel filter when he changed it. Im thinking its the fuel pump. He thinks the car jumped a tooth in time but I really do not think its that. Every one I have talked too has told me that if it had jumped time, that it would run like crap either way. Whether it was cold or hot. It runs fine as long as its cold but the minute it warms up it starts acting up. We have pretty much rebuilt the engine with all the work we have done on it. I am just at wits end with it.
if it jumped time a tooth Yes it WOULD run bad, We need the computer code to accurately assess whats went wrong, but if you've changed all that I have to ask did you check the wiring yet?
And what do you mean " Blowing the camshaft sensor"? is it physically burning out or just popiong a code?
Oh, and water in the fuel filter wont; damage a cam sensor, that will just make you run bad, and if the pump is bad, you'd never get it started
Since my last post we have reset the computer and it runs fine for about an hour and then the rpms start jumping again,. The code I was given was p0446 something with my evap system,. As long as the car is cold it runs fine but the minute it warms up it is running rough. We think its the computer but I was told that if it was the computer my car wouldn't do anything.
I changed that and the purge valve under the hood. It runs fine for a minute then the rpms start jumping again but not as bad as the last time. I am at lost as what it could be.
Check tank venting. Remove the gas cap and then disconnect the gas tank vent line from the canister. Blow through the vent line towards the fuel tank. If you can't, it's blocked. If you have access to a compressor, you can try to blow it out. If no luck, you have to drop the fuel tank.
An outside possibility would be bad gas. We have no emission testing here so some just rip out the whole system (federally illegal).
The guy at auto zone checked the top of the motor for leaks and couldnt find any. The code he gave me was p0341 its indicating my camshaft sensor which was jus replaced not to long ago. When my car is in park it idles at -20 degrees. I think the firing order is off or the distributor cap is not set right. When you first start it, it revs high and then drops.
gotta go the data profile with a scanner to check cam and crank sensor, along with total advance, btw, was that new sensor an o.e. unit? many ignition systems will idle at almost 20 deg advance.... smoke test equipment will force low pressure smoke into the emissions test port this tests the entire vac.- emission-intake system .... the computer , in order to run the engine can generate the cam signal . lots of variables may wanna take it to a with a good rep for diagnostics
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