Help on my "88 when its cold first start my truck smells rich wants to backfire? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hoods69BadBowTie · 10-26-2011, 10:39 PM

So thought I had fixed this problem last spring but apparently not. With it getting cold at nights now when I first start it in the mornings wants to run ruff and backfire a few times then will idle normally. Anytime later on in the day I start it runs just completely perfect. Smells rich so to much fuel I am guessing is the problem. I put new plugs in last spring and new coolant sensor front of the intake on. Also put a new IAC motor on the TBI unit. I recently tightened up the headers and put TBI cleaner through it to clean it up. So I know the timings on cause we did that as well last spring. Would having weak back pressure on the exhaust or injectors going bad do this? Any input or help would be greatly appreciated I am at the end of my rope with it haha! Its an '88 chevy 350 TBI 5 speed 4x4 2500

10-26-2011, 10:39 PM	#1
Hoods69BadBowTie Chevys Kick A$$ Join Date: Jan 2005 Location: Zootown, MT Posts: 12,699	Help on my "88 when its cold first start my truck smells rich wants to backfire? So thought I had fixed this problem last spring but apparently not. With it getting cold at nights now when I first start it in the mornings wants to run ruff and backfire a few times then will idle normally. Anytime later on in the day I start it runs just completely perfect. Smells rich so to much fuel I am guessing is the problem. I put new plugs in last spring and new coolant sensor front of the intake on. Also put a new IAC motor on the TBI unit. I recently tightened up the headers and put TBI cleaner through it to clean it up. So I know the timings on cause we did that as well last spring. Would having weak back pressure on the exhaust or injectors going bad do this? Any input or help would be greatly appreciated I am at the end of my rope with it haha! Its an '88 chevy 350 TBI 5 speed 4x4 2500 __________________ HOODS is what I answer too -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER I would rather push a Chevy then drive a ford!! Last edited by Hoods69BadBowTie; 10-26-2011 at 10:42 PM. Reason: Add vehicle info to post



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