engine rpm dont go over 3000

[GLHfreak]

dont go over 3000rpm its 2.5 T1 and it backfire over like 2000 if floor it

[turbo minivan]

its gotta be your timing or a bad vacuum line going to your MAP sensor.
check your crank/cam/distributer timing, then be sure that your ignition timing is at 12* wile the coolent temp sensor is unplugged.

[ButchSuppe]

Check for a clogged ex. sys.

[GLHfreak]

2.5 straight on the side

[85boostbox]

sounds like a typical tps sensor

[roachjuice]

map sensor.

[moparfreak3]

Codes? Could be any number of things

[RampageTurbo]

+1 on the clogged cat. Here's a freaky one that happened to me on a Horizon. It wouldn't idle right,figured out that it had the original timing belt and had jumped time so I adjusted the distributor and got the ignition timing better. After that it wouldn't rev past about 3200. I pulled the valve cover and found that an exhaust rocker had popped its pad and was sitting sideways under the cam. The exhaust valve wasn't opening completely so it was restricting the engine speed. Probably a once-in-a-lifetime freak thing.

[GLHfreak]

no cat

[IROCNOROLL]

Quote:

Originally Posted by GLHfreak no cat

Obviously, cause it's running like a dog.

MAP vac line leaking / baro solenoid leaking... MAP off calibration... TPS off calibration / dead spot... HEP mis-triggering / trigger plate loose in the distributor... T/Belt off a tooth... Secondary ignition issues, coil, wires, etc... fuel pressure / supply.

As was asked above, CODES? A little more info to work with here? Many of the usual suspects will set codes if a hard fault, but not necessarily on a sensor operating a little off cal.

[GLHfreak]

ouin

[GLHNSLHT2]

codes will tell you everything.

[IROCNOROLL]

Quote:

Originally Posted by GLHfreak ouin

ouin?