Running rough...Help please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chucks70 · 07-19-2003, 08:32 PM

Took my POS for a 56 mi. each way jaunt today. Had about 400lb of gravel in the bed. Engine is 350, HEI with 1 yr. old module, new plugs, Edelbrock 600 Model 1406 (electric choke) and Edelbrock performer EPS. First 5-10 mi. no problem. After that anytime it was under load ie. going uphill or passing it seemed like it was fighting itself to spin faster. Back off the accelerator and it runs smooth. A couple of times it backfired. Timing is set at 12 before initial, has stock vacuum advance and weights. Average speed was about 65-70 mph. Did very little adjusting on the carb. out of the box. Seemed to run great on local trips.....Uh no I didn't put a fuel pressure regulator on it. Any ideas?

07-19-2003, 08:32 PM	#1
chucks70 Registered User Join Date: Feb 2002 Location: Cadiz, OH Posts: 628	Running rough...Help please Took my POS for a 56 mi. each way jaunt today. Had about 400lb of gravel in the bed. Engine is 350, HEI with 1 yr. old module, new plugs, Edelbrock 600 Model 1406 (electric choke) and Edelbrock performer EPS. First 5-10 mi. no problem. After that anytime it was under load ie. going uphill or passing it seemed like it was fighting itself to spin faster. Back off the accelerator and it runs smooth. A couple of times it backfired. Timing is set at 12 before initial, has stock vacuum advance and weights. Average speed was about 65-70 mph. Did very little adjusting on the carb. out of the box. Seemed to run great on local trips.....Uh no I didn't put a fuel pressure regulator on it. Any ideas? __________________ 68 1 ton dually 292, 2001 Sebring, 2004 Trailblazer, 11 Camaro Convertible.

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