• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Heavy Isolated Misfire Under Load

Jomamma

Jomamma

pssssshhhhhhtt
My 97 gtp is having heavy misfires on Cylinder #1 when accelerating any harder than grandma mode. The problem began after my 1.9 Rocker Install.


I re-inspected under the valve cover. I ruled out the spark plug, the wire, the coil pack and the ICM. I have no codes besides the misfire.

Any Ideas or suggestions will be greatly appreciated.
 


I found the problem. One of the pedestal spacers is missing. Which is odd because I remember taking the last one out of the packing.

Anyway the box that had the packaging is at the dump now if it was in there.

Where can I buy them?
 
might need to contact harland sharp.. Or maybe you could bring a normal spacer to a machine shop with a rocker spacer to have them machine in the curve?
 


Drunkie said:
Contact harland sharp, and I wouldn't drive the car until it is fixed.
Click to expand...

I already contacted them.

I dont really have a choice, I have class and work and this is the only car I have available to me atm. I made my own spacer in the mean time and I disconnected the boost bypass solenoid.

HighOctaneRacing said:
At least you found the issue
Click to expand...
Tell me about it. I'm so relieved. Since friday every ounce of free time I've had has been put into that car. Im drained.
 
Scottydoggs said:
see what happens when you work in the dark???

good find tho.
Click to expand...

Thats what I've been telling myself all day.

"Thats what I get for working in the dark"


Hopefully I didn't bend the valve or damage a piston. That random noise I heard was knock due to the built up pressure not being exhausted quickly enough.
 


I've seen two come up missing and I know they were installed.

Hmmmm now who the hell did I give that bag of spare spacers to? Right..I'm the guy that had spares, and gave the bag to someone.......
 
I hope its not in the engine somewhere.

Harland sharp got back to me they're sending me one for the price of shipping.
 
Jomamma said:
A normal spacer? Where would I get this normal spacer?
Click to expand...


Like a bolt spacer from ACE or similar lol. like what we put in the accumulator for shift kit, and just have the curve machined into it. But since you already have one coming from HS you'll be good to go.
 


If yours is a newer set you have nothing to worry about. it was the original ones that first came out from HS that had an issue. Mine are great!
 
Put the new spacer in.

Car still misses under throttle.


Now I can see what everyone was talking about. The spacer I got had a little dot on one side. I guess I didn't have the revised set.
 
You must log in or register to reply here.
Back
Top