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03-07-2015, 01:06 AM
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#1 |
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Registered User
Join Date: Feb 2015
Location: Midland TX
Posts: 5
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1991 R3500 TBI Rich
Howdy all, I have a 1991 R3500 CCDRW that i recently have picked up. good solid truck but runs and idles rich as Scrooge McDuck. if I give it more than 1/2 throttle it bogs and just dogs out on me. Also does it when the cruise adds fuel to regain speed. I have changed my temp sending unit as the last one was bad and it was suggested to me that the low temp signal could be triggering an enrichment map to warm up the engine. Im not getting a SES light even when it bogs down on me. I would appreciate any input as I have next to 0 experience with these TBI engines.
Here she is:  Air ride and custom interior on the horizon. Last edited by criostior; 03-07-2015 at 01:18 AM. Reason: spelling and add pic |
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03-07-2015, 08:21 PM
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#2 |
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Registered User
Join Date: Feb 2015
Location: Midland TX
Posts: 5
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Re: 1991 R3500 TBI Rich
Upon further digging today I swapped the map sensor with a know good one of a parts truck I have and no change. The PO changed injectors at some point but I am thinking the are flowing too much fuel. The spray patter looks heavy and you can see it running down the sides of the barrels. They do not drip when the motor is killed. Does anyone have a pic or can describe what the spray pattern should look like?
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