I have a 87 blazer and I put a new motor in it but now it won't go over 35 mph

Asked by Apr 10, 2015 at 11:15 PM about the 1987 Chevrolet Blazer 4WD

Question type: Maintenance & Repair

7 Answers

78,435

Plugged exhaust is my first thought, might have the exhaust back pressure tested, the other could be fuel, replace the fuel filter and then have the pressure and flow tested.

Best Answer
16,255

Is it not shifting or the motor is incapable of it?

It was shifting just didn't seem like it was opening up it worked before then I worked on the timing bc the Rev was to high

16,255

Where did you set the timing at? Did you remove the est connector when you set it?

No I didn't remove it

16,255

You need to set the timing at 0 with the connector unplugged. It's a little brown wire with a black tracer that has a connection in the middle of it.

Ok thank you

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