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Pontiac of the Month

gscherer78ta's 1978 Trans Am

2019 February
of the Month

  • Welcome to Forever Pontiac

    We are a community of Pontiac enthusiasts. The purpose of our community is to keep alive the Pontiac spirit by sharing (or showing off) our cars, discussing Pontiac, helping each other work on our cars and find information, plus attend various meets/shows/etc... To aid discussion, sharing, event planning and selling of parts/cars/anything, we have various parts of the website to aid this from Forums to an online Garage to Classifieds to even a Document Download Repository. You can find links to these in our navigation above based on what each section helps with (discussion, local events, learning, etc...).

    We invite you to contribute, find help or just view some of our member's amazing cars! Don't forget, we also have great contests from time to time (like our Pontiac of the Month and yearly calendar contest) and our Pontiac This OR That, a fun game where you choose the best of two randomly selected Pontiacs from our online garage.

    We look forward to seeing you around!

  • 0
Nsay40

Grandprix Gt 02

Question

So I have been fighting with this car ever since I got it. Engine is 3800 series 2. Engine code p0300. The problem is my cat keeps getting clogged. I've replaced upper and lower intake manifold gaskets, cleaned throttle, new throttle gasket, cleaned injectors, new injector o rings, new thermastat, and gaskets. New air filter, new plugs and wires, new coils, new icm. Cleaned maf, new fuel filter, new coolant elbows, and a new universal cat that was only 3 months ago and is now clogged. My last cat was clogged entirely nothing but black sludge. So I fixed all the coolant leaks and added new cat and the car was running brand new now it's showing symptoms of being clogged again. It runs real cool on the highway but when I get into the city with stop and go traffic it overheats with the Guage fluctuating and performance drops. Maybe my fan isn't cooling my engine? Idk. Any advice would be appreciative.

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