91 VR-4 problems after 60k service and 99 lifters

[VanDamned]

I just had the 60k done with 99 lifters and now the car barely accelerates and backfires on deceleration very loudly.

The car has GM MAF with Blow Through.

[anyonebutme]

sounds like timing is off

[stealthee]

I'm with Chris. Timing is off.

[VanDamned]

My mechanic said he checked and rechecked the timing after these symptoms came up and everything was spot on.

I was thinking maybe he primed the lifters, but Eric from 3sx told me even if that was the case it wouldn't cause what's happening.

[stealthee]

Did your mechanic check the ignition timing as well? 91 and 92 have an adjustable cam sensor that can adjust ignition timing. This could also be an issue if the timing belt marks indeed line up. Still make sure he checked the mark on the crank as well. If he was only verifying the cam alignment he could be one tooth off on the crank.

[VanDamned]

I will ask him about the cam sensor.

The car ran fine when I picked it up, It did feel slightly more laggy though right off the bat. And by that night it was clear something was way off.

[stealthee]

Did you make sure the intake is still seated on the throttle body okay?

[VanDamned]

Yes all connections are good

[VanDamned]

So my uncle took a look at the car with me tonight and said my timing is off.

Apparently those two lower marks should line up as well as the two circle marks?

[ICPREY]

Timing marks are on the valve covers and the upper marks on the cam sprockets should line up with them. Your crankshaft timing mark may also be off.