What could be causing my 1991 Volkswagen Jetta GL to be losing power like this?
Ok I already know that my 91 VW Jetta GL needs an exhaust manifold replaced, and I am wondering if that would cause it to lose power at 2500 rpms? It will be going just fine then if I let it get above or at 2500 rpms it just bogs down, and will not gain
Good Jokes, Cars, and Great Sex all depend on Proper timing.
If you haven't timed your car then do so now.
To time the 91 you have to have the engine up to temp.
then using a timing light on number one plug.