Rep Power: 350

Ok, my car does fine under 7 or lower psi. As soon as I switch to high boost (about 10 psi), I get almost to the top of second and it goes into limp/safe mode and I can't get it over 3400 rpm. I'm not sure if it's the clutch that can't handle the torque so it overrevs or I'm not bleeding out enough manifold pressure through my check valve. I'm just using 2 regular gm check valves in between the map and the manifold but I've been thinking of using the missing link for awhile. Any thoughts or suggestions?

 
Rep Power: 0

Are you positive it is going into limp mode? I think you will need more than 2 check valves, I have seen as many as 4 on certain kits (other apps). I would suggest getting the Synapse ML004 it works wonderfully.

EDIT: It could be that the vacuum pressure is too much for your check valve set up to bleed off and your ECU is seeing positive pressure. I would bet on it being that.

 
Rep Power: 330

Sounds like a MAP error. The missing link is probbibly your best bet.

 
Rep Power: 0

yeah andy, order that missing link....i will be ordering that when i get back from vacation....

 
Rep Power: 362

mine did that too ... get denso ik22's ... I dunno if that'll fix your problem, but for some reason it fixed mine when that happened to me

 
Rep Power: 0

Wow I am having the exact same problem. I was thinking it was a fuel issue. I have a check valve setup also.

Let me know how it goes.

 
Rep Power: 350

Well, I talked to Mike Stafford, his suggestions were: go with autolite plugs and gap b/w 32-35, keep an eye on my a/f gauge to see where my fuel mixture is and to run a test light to make sure the alcohol injection is working. I've swapped the plugs but haven't tried running it again yet. I'll be trying soon though just to see what happens.

 
Rep Power: 0

Hey brother,

PM me with results when you figure it out. I am still having the same problem. I put in the iridium plugs. I tested the fuel and alch. Keep me posted thanks

 
Rep Power: 350

What did you come up with after those tests?

 
Rep Power: 0

I am not sure yet. I just know that they are spraying,.

I am at a solid 6psi, any more and everything goes to ****.

 
Rep Power: 0

Add another 2 check valves to your string of check valves.

 
Rep Power: 0

Thanks I added another PVC valve(check valve) on line w/ my MAP sensor. It did the trick up to 10psi on new DH clutch. WIll up it to 12psi when I can take time to tune for safety.

 
Rep Power: 0

Sweet, np!

 
Rep Power: 0

OK anyone having this problem get the Missinglink Check valve.........

I installed mine tonight and it did the trick. Had the boost set too high and spiked at 14psi. The missinglink held and no check engine light. It works perfect. No more MAP sensor problems and reseting the battery.

There is someone on this site selling one. Look under the sales forum.

 
Rep Power: 0

im sorri but what is a check valve? im getting my kit in a few weeks so i geuss i will be getting this prob 2?

 
Rep Power: 0

I bought a used SF kit and did not get the check valve from SF. I used a one way PVC valve and had problems. If you are buying a new kit it should come with one that will work. But if you want something nice get the missinglink it is a billet one piece unit that is a perfecr fit.