When it rains it POURS!!!
 

Took the car for a spin yesterday evening after getting the plenum pull finished and all buttoned up.

Seemed like the idle was still a little high...guess I need to check that primary throttle plate actuator like rhipsher has suggested I do.
So, I stop and blip the throttle, get it to idle down then decide to blow the cobs out a little. Nailed the throttle from a slow roll and before I could catch it, the back tires let loose and I hit the rev limiter...I think...tach flashed 8k. CRAP!
Drive the rest of the way home, no issues, but I think I hear something.
Go out today to drive it down the road and definitely hear something now.
Pop the hood and hear a clatter that seems to be coming from under the drivers side cam cover.........#$%)@((#&%*()&()#*@$&!!!!!!!!!!!!!!! !!

So, if you were to venture a guess...lifter...cam lobe??? I think I'm in the same boat as VetteMed...don't have the dinero's to pull the motor or to send the car to Mark or Corey right now. Is pulling the cam cover for a quick peek a big job that can handled in the garage?

CRAP CRAP CRAP...:mad::mad::mad:

Re: When it rains it POURS!!!
 

PS is not bad, but not easya the bolts tend to stick alittle......a quick trip to 8K really should not do the motor in. the 8K failures I have heard of were more sustained speeds as you would at a track......but with aged pieces, who knows.

Re: When it rains it POURS!!!
 

It was a VERY quick trip, but you know us old guys and our reaction times! Got off the throttle as quick as I could lift my foot. One of those "DAMN THAT WAS QUICK" moments.

I'm going to have a mechanic buddy come take a listen. I just noticed that the serpentine belt tensioner is bouncing around. The motor runs smooth and doesn't seem to have a miss like I would expect, so I'm still searching.

Re: When it rains it POURS!!!
 

If you hit the rev limiter, shouldn't it have not spun beyond whatever the limiter is set at?

Re: When it rains it POURS!!!
 

Correct, only way to over-rev is either due to an incorrect shift (meant to hit fifth, got third instead, or a poorly judged downshift (should have grabbed third, went for second instead). Either situation will not be prevented by a rev limiter in the ECM / PROM.

Re: When it rains it POURS!!!
 

Actually it was just a hammer down acceleration in 1st that spun the tires and I saw the tach hit 8,000...come to think of it, it never even acted like it hit a rev limiter.

Re: When it rains it POURS!!!
 

if you hit 8k you either don't have a limiter on your chip or your tach is off. factory redline is just over 7, I know of a few 415's that are 7.5

Re: When it rains it POURS!!!
 

I'm thinking the limiter has been E-limi-nated at some point in this cars life

Re: When it rains it POURS!!!
 

i can't imagine why someone would do that

Re: When it rains it POURS!!!
 

Dave, Sorry to hear the bad news. Guess you have to get another ZR-1 until you can get the car to Mark or Corey, Dont forget about Aaron (SGC). That is a beautiful car, Are you thinking 385 or 415?