Running rich and rough idle what could be the cause

RA.CHIVAS.RA

MEMBER
1991 CHEVROLET CAMARO
190,000 MILES

I HAVE A 91 MODEL CAMARO I SWAPPED THE BLOCK ON IT HAD 305 NOW A 350 IT IS A TPI SETUP THE ISSUE IM HAVING IS A ROUGH IDLE IT SHAKES ALOT AND IT SMELLS ALOT LIKE GAS IN OTHER WORDS RUNNING RICH CAN ANYONE HELP?

Friday, August 10th, 2012 AT 1:06 AM

7 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Could be vacuum leaks. You need a scan tool to monitor reading to find out what the sensors are seeing. Did you change everything back to your origianl motor? Only hte long block should be from the donor motor

Roy

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Friday, August 10th, 2012 AT 1:14 AM

RA.CHIVAS.RA

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What scan tool do I need and where could I get it and everything was put back the only thing different is new wather pump new plugs I used the same wires beacuse I did have that much with them before I did the swap that I had the smog pump removed I had a guy that got it timmed to as best as possible the timming is off by a little bit should I change the distributor and also if I did the engine swap do I have to
program the computer

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Friday, August 10th, 2012 AT 1:23 AM

RA.CHIVAS.RA

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14 POSTS

It is a short block

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Friday, August 10th, 2012 AT 1:24 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Did you use the 305 heads on a 350? If so, why? The 350 heads work so much better than the 305.

The scan tool is a professional one from a shop and costs about 2500. It would be cheaper to have them run the info for you and print out the results.

Roy

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Friday, August 10th, 2012 AT 1:30 AM

RA.CHIVAS.RA