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View Full Version : Just bought a 90' SC, having boost related problems



66_Fairlane_289
09-03-2017, 08:15 PM
when under load, at like 35 mph in 3rd and I try to accelerate the rpms stay at like 1500 and it goes into boost and knocks, still without accelerating. Any ideas on what could cause this?

potshotscott
09-03-2017, 09:00 PM
There are many things that will do this so not trying to make you "lock on" to one thing but it's either some sort of cam/crank sensor timing issue or you have a wasted harmonic balancer that's messing with things. It's a gutless wonder under boost no? How high does the temperature gauge go?

XR7 Dave
09-03-2017, 09:41 PM
That or might be clogged cats/exhaust.

66_Fairlane_289
09-03-2017, 10:09 PM
There are many things that will do this so not trying to make you "lock on" to one thing but it's either some sort of cam/crank sensor timing issue or you have a wasted harmonic balancer that's messing with things. It's a gutless wonder under boost no? How high does the temperature gauge go?

I'm thinking its a sensor cause the check engine light is also on and I'm picking up a scanner tomorrow. And the temp gauge reads just above half

TSC89
09-04-2017, 10:28 PM
One of my SC's did this and it ended up being a cracked spark plug.