Wont rev past 7k

[91BlackLaser]

Hey guys. I need help i am confused out of my mind about this issue. The car refuses to rev past 7k no matter what i do. It stopped everytime as if it was a preset rev limiter. no matter weather its a free rev or under load. also after it hits this rev limiter it sputters for a few seconds after i change gears. The only sensor that i know that is having issue is the coolant temp sensor for the ecu. Can someone please help me cause i am at a loss. The rev limiter in the aem is set to 9k.

set up is
aem ems
1g
2.4l
1600cc injectors
dynatec arc2
stock coils and ignitor
plugs gapped to .28

 

[91BlackLaser]

nothing no help

 

[NightRider97]

Have you thought that you might be floating valves? If your revving that high all the time you need to change valve springs atleast every other year. I used to pit crew for a friend running pro NHRA in a 62 Impala SS with a 355 that wound out 9,200rpm through the traps. We changed the valve springs on that car twice a year for peace of mind if nothing else. But normally they would be showing signs of fatigue and weren't passing their spring test anymore.

 

[91BlackLaser]

the car has dual valve springs in it and they are relatively new and valve float is usually not as consistent as what i have been experiencing

 

[bNasty]

check your dynatek or whatever sometimes there is a setting on the box for a limiter i think, dont quote me though

 

[91BlackLaser]

I disconnected the dynatek altogether and it still doesd the same thing

 

[NightRider97]

On a side note, cus I'm not sure whats causing you to stop at 7k at this point, ditch the dynatek. I was one of the first members here to run one and they are junk. I've never had one last more than a couple thousand miles. I've burnt out 4 or 5 since I've had mine, 2 of them this year alone. Not worth the headache. Yea its great when it works but not after only a couple thousand miles and it fails to send spark signals.

 

[92tsiawdguy]

What do your a/f ratios look like at 7k? Sounds like you're loosing spark because of a week ignition system or running out of fuel.

 

[92tsiawdguy]

Edit test your stock coil pack and wires. Sounds like that could be your problem.

 

[91BlackLaser]

Well the dynatec hasn't been bad to me so I won't scrap it just yet. But I will try a different coil pack. I know the wires are fine because they are also new and the plugs are also new.

 

[92tsiawdguy]

Dynatek makes good shit

 

[NightRider97]

Dynatek makes good shit

Yea right. You deal with sending in your amplifier 4 or 5 times, having you car down a month (for turnaround time) each time, and then report back how good their "SHIT" is.

 

[92tsiawdguy]

Never had a problem with it. On my bike or my car. Sounds like some unrelated issue with your wiring

 

[NightRider97]

My car wasn't touched in terms of wiring so there's no harness side faults, and I purchased the dynatek wiring harness that is plug and play for a 2g dsm. I even sent the entire harness back the last time the box fried and had them test it. They said there were no issues with the harness. Its just a poor ignition box.

 

[91BlackLaser]

WEll after about 4 coil packs and i finally found one that works and has fixed the problem. Thank you guys for all your help.