I've been chasing a problem causing my engine to idle and cruise rough for a while now. All started after putting in 50's with T+ and a cam swap.
I've replaced or check about everything but the intake gasket itself. (I did the carb cleaner check on the topside) I figured it was the 50's, because they wanted to run rich with low BLMs on me. Tried with and w/o the T+ & extender also with a PTE chip. Put the stock maf back in during that.
I finally decided they might need a good clean&flow. I took them out and put my old stockers back in to test. Still rough, actully been getting rougher it seems, cutting off all the time. I figured all that was from fouled plugs, but no. Stock injectors doing it to, BLMs are ok on it as long as I stay out of the throttle, plugs look good.
I checked the outside header temps, all were around 500* cept for #6 was about 100* less. that plug is cleaner too. Swapped that plug for a new one, and put the noid light on the injector, everything seems fine.
My main question is this.... Could a vacuum leak from under the intake on that port cause a low exh temp?? I would think it would be hotter if it's running lean, but I guess if it's so lean it's not combusting good it might be cold. Any ideas much appreciated.
I've replaced or check about everything but the intake gasket itself. (I did the carb cleaner check on the topside) I figured it was the 50's, because they wanted to run rich with low BLMs on me. Tried with and w/o the T+ & extender also with a PTE chip. Put the stock maf back in during that.
I finally decided they might need a good clean&flow. I took them out and put my old stockers back in to test. Still rough, actully been getting rougher it seems, cutting off all the time. I figured all that was from fouled plugs, but no. Stock injectors doing it to, BLMs are ok on it as long as I stay out of the throttle, plugs look good.
I checked the outside header temps, all were around 500* cept for #6 was about 100* less. that plug is cleaner too. Swapped that plug for a new one, and put the noid light on the injector, everything seems fine.
My main question is this.... Could a vacuum leak from under the intake on that port cause a low exh temp?? I would think it would be hotter if it's running lean, but I guess if it's so lean it's not combusting good it might be cold. Any ideas much appreciated.