Electrical / Lighting Systems Other When accelerating Always
Q: The code for MAF goes on at 5200 RPM, and the car starts to jolt/pulse.
I changed MAF and ECM and it didn't solve the problem. Checked all the wires. Can someone help me!!!
A: Is this a new MAF you changed to?.... Or An after market of GM?...
With the car idling, tap with a ball point pen on the case of the MAF... If the car surges or idles roughly, replace or return it.
Another thing to check is the air filter. These cars are sensitive to micron flow ability of the air filter... At 5200 rpm this could be an issue.... Ed
Q: I am trying to get the best fuel economy from my 190 h.p. 350 "Crate" engine. It has a 2 barrel carb. I know there are timing tricks but I'm not sure exactly what those are plus any other tips. I don't care much about power at this point. Thanks.
A: Cubic inches combined with 3600 lbs of weight and 60mph speeds means about 14mpg.....16 would be wonderful. Ed
Q: Rebuilt 283 with hi volume oil pump.
What is max safe oil prissure in psi?
A: When engine is cold, it would not be uncommon for you to have 50-60 psi, depending on brand of pump and the spring in the pump..
It should climb up some at high RPM's and drop a little when warmed up.
In a small bock chevy you can run at 8-12 psi with not problems but he more the better.