My 390 FE has a hot cam, Street Demon carb. It's been trouble tuning it to optimum. It'd be running fine and then, for no apparent reason, stall. Restarting afterward would be problematic.
Had always thought that this was due to my inexperience in doing a proper tune-up. So I took the car to a shop specializing in performance engines and had them do the tune up.
When I picked the car up it ran better than it ever had before. It drove fine through the surface streets leading to the highway and then ran OK at highway speeds. But after about 10 miles, off the highway in stop-n-go traffic, it stalled again. It would restart but stall when put in gear. After several start-stall iterations, it wouldn't restart. Had to tow it home. The next day I got it started (using some canned starting fluid) and drove it a short distance.
Started it again a few days later. After a full warm up, it idled smoothly for about 5 minutes and then faltered and died.
Would the above description suggest a problem with the stock mechanical fuel pump? Or is there another possible explanation for it?
I compared the specs for the Demon carb and the stock fuel pump. The input fuel pressure range for the carb is slightly higher than the output range of the pump, but the nominal numbers do fall within both ranges. However, the pump is old. Have considered replacing with an electric pump.
Cheers,
Had always thought that this was due to my inexperience in doing a proper tune-up. So I took the car to a shop specializing in performance engines and had them do the tune up.
When I picked the car up it ran better than it ever had before. It drove fine through the surface streets leading to the highway and then ran OK at highway speeds. But after about 10 miles, off the highway in stop-n-go traffic, it stalled again. It would restart but stall when put in gear. After several start-stall iterations, it wouldn't restart. Had to tow it home. The next day I got it started (using some canned starting fluid) and drove it a short distance.
Started it again a few days later. After a full warm up, it idled smoothly for about 5 minutes and then faltered and died.
Would the above description suggest a problem with the stock mechanical fuel pump? Or is there another possible explanation for it?
I compared the specs for the Demon carb and the stock fuel pump. The input fuel pressure range for the carb is slightly higher than the output range of the pump, but the nominal numbers do fall within both ranges. However, the pump is old. Have considered replacing with an electric pump.
Cheers,
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