bigap15

Had the car up and running, it would idle somewhat decent for not much of a tune. Drove it up the road, had power through all the rpms. Was running somewhat decent. On the way back to the house, it started making a sound like an exhaust leak, but its not a ticking noise, more like a whoosh whoosh noise. Now it doesn't run right. I can rev it up slowly and it will go up to about 3k then it wont rev up no more, like it wont take fuel. If i put it to the floor it wont rev at all. Fuel pressure doesn't drop when doing this so I dont think it is fuel related. Fuel pump is somewhat new. I have checked headers and all bolts are tight so I know its not an exhaust leak. It sounds like it is coming from the backside of the intake. I have checked all vacuum lines and cant find a leak. I thought timing could be the issue but it is set to 12 and it was running fine before the noise so I dont think it has anything to do with it. Could it be the intake gasket leaking? Im not losing coolant and oil is fine so I dont think it is the head gaskets but I plan on doing a compression test to rule that out. The intake gasket is a felpro 1250, with rtv for the front and back where it meets the block. Any suggestions??


Mods are 306, with patriot heads, trick flow stage 1 cam, trick flow track heat intake, and normal bolt ons. Tuning with quarterhorse, with BE&EA

mjr46

make sure there are no air leaks after the maf

MustangBradley

I would check the PCV valve. If you had some crank case pressure issues, it could have popped it out of it's seat, leading to a big vacuum leak. It is at the rear of the lower intake manifold.