07blkvette

My car is breaking up at high rpm's in fourth like at 110-120 mph. What could it be and where do I start? Its supercharged with meth. Could it be belt slippage, clutch slipping or is it fuel or spark related? Thanks....

0Slowhawk

Probly spark or fuel. Stop flooring it till you get it on a dyno or something to check it out. If not it might cost you a motor.

07blkvette

ttt.....

realcanuk

Too little info to help there. You need to get it on a dyno and scan it while running it.

DOUG @ ECS

Possibly valve springs, bring it in if you can, I'm sure we can figure it out quickly for you.

07blkvette

Doug, I have your meth system and at times the red or green light didn't come on but when I pull over and push the test button it turns red then green and car bogs down. Is there a chance its the meth system?

DOUG @ ECS

Sure, anything is possible. The vacuum/boost line to the alky MAP sensor might have a break in it which would cause the situation you just described.

Ryan07

Had the same problem. Pulled the MSD wires off and 6 of the wires had boots that were flaking apart. Installed new plugs and wires and she never had the hesitation (misfire) again. It would start around 4500 rpm and go to decline.

Ryan

Frans96ss

Deff seems something either tune/spark/ meth related. Do you have a wideband in the car? If so whats it reading? You arent too far from us. If you wanna stop by one day and have us look feel free. It will probably be fairly easy to figure out.

07blkvette

Where is the alky MAP sensor located?

07blkvette

Doug, where is this MAP sensor located?

eboggs_jkvl

Usually rear of intake manifold on passenger side of car.


Elmer

07blkvette

Thanks...

Slo-Poc

Change all plugs, then check all lines to and from meth system. A bad tank of gas may all do it to you. drive that tank out and fill with some fresh.
Hope that helps gl

07blkvette

I changed the plugs, I believe its the meth. When I hit the test button the system works lights go from red to green car bogs down. When I drove it the lights wouldn't come on, so I pulled over hit test button and worked fine. Drove it again it worked but would come on at 3000rpm's then other times not till 4000rpm's. My question is what activates the system when driving the car?

DOUG @ ECS

MAP sensor for your alky system is in the drivers side kick panel if we installed it, but I thought you did your own install? Either way, the MAP sensor on the intake will not help you.
If you have time to stop in we can check it out for you in minutes.

07blkvette

No, you installed and tuned it for me. Could you sell me a new map sensor?

07blkvette

I wish you were close enough that I could do that.