carb switch - Team Camaro Tech
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post #1 of 7 (permalink) Old Oct 25th, 00, 06:14 PM Thread Starter
 
Join Date: Aug 2000
Location: SALINAS,CA.
Posts: 12
Angry

hey guys,

Me and my brother just changed the carb that his 83 Z-28 had.And now when we try to start the car it just keeps cranking over and over.When we put in some starting fluid it turns on for about 2 seconds then shuts off.Also we changed the feul line to a SUMMIT one,steel braided.I have checked the carb and it seems to give gas to the engine.I also checked the spark plugs and they were covered in carbon and were oily wet.Could the problem be the spark plugs and ignition?Or the carb itself.?please any help is appreciated.

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post #2 of 7 (permalink) Old Oct 25th, 00, 08:19 PM
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Location: Ft Worth, Tx USA
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Hey Buz,

If it starts on starting fluid, it's not the plugs. If the carb has set for a while the needle can be stuck in the closed position. This won't let fuel in, but the first thing to do is take the fuel line off put it in a can or something and crank it over to see if fuel is coming, if fuel is coming then hook the line up and gently tap the carb in the area where the line goes in. Do this while cranking over so the pressure from pump will help.

Larry
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post #3 of 7 (permalink) Old Oct 25th, 00, 09:30 PM
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Is this thing still ahve the computer hooked up? The original Q-Jet was electronic in the front half. When you change the carb. then you must swap the distributer fo a conventional HEI. One with vacuem and mechanical advance, That 7 pin unit is no good with out the computer, and that is not going to do anything till you put the carb back in the loop. Galen

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S/B Chevy Lover
67 Camaro street car
10:50's @ 128 on motor w/383 cid
79 Z28 w/383 9.1:1 3.73:1 Restoring stock apearance
13:40's @ 101 stock exh.& intake& Qjet
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post #4 of 7 (permalink) Old Oct 26th, 00, 02:20 PM
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I beg to differ with you Galen, I put a non-computer carb on my 86 MCSS and it started and ran, not very good, but it ran.

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Leo Paugh
MCC #017
www.clark.net/pub/chevelle/mcc.htm
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post #5 of 7 (permalink) Old Oct 26th, 00, 05:20 PM Thread Starter
 
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Location: SALINAS,CA.
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hey thanks guys but we went from non computer controlled to computer controlled.hope this helps.By the way fuel does come out the fuel line.

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post #6 of 7 (permalink) Old Oct 29th, 00, 06:46 AM
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Now Leo, I didn't say it wouldn't run. Of course it will, unless something else is going on with it, But there is no advance mechinism to control the timing, hence the running "not very well". Galen

------------------
S/B Chevy Lover
67 Camaro street car
10:50's @ 128 on motor w/383 cid
79 Z28 w/383 9.1:1 3.73:1 Restoring stock apearance
13:40's @ 101 stock exh.& intake& Qjet
smog legal
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post #7 of 7 (permalink) Old Oct 30th, 00, 11:48 AM
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If no other changes are made, the timing will still be controlled by the computer, but the computer will have no control over the fuel. It won't see throttle position and probably will be in limp-in mode all of the time which will be a fixed timing.

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Leo Paugh
MCC #017
www.clark.net/pub/chevelle/mcc.htm
There are no strangers here, only friends you haven't met.
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