My 03 is currently having a Greddy turbo system installed and dyno'ed on a dyno pack. The car is getting a real bad dip after and during v-tec. The tuner is a greddy authorized rep and is currently working with them to help resolve my problem. The car is falling off around the v-tech point and not making much HP ~230 compared to other kits. They have done a compression check and check over the install mulitiple times. I also have a new manifold. Is there any other things I should consider checking? I have read some things about the actuator or possibly a bad e-manage? Any idea's would be helpful.

My supporting mods are listed below.

 

sounds like maybe vtec is not engaging.

 

Mine does the same thing I think. I even installed my 70 single and it still does it. (thought it was a problem with flow) I wont know for sure till I can throw it on the dyno to verify..

 

ditto....i think...tuner will tell

 

Check that the vtec solenoid is getting 12v during vtec. Also, make sure that the oil pressure sensor wire is securely fastened. Chances are that might have been missed during the relocation of that sensor during the install.

If all that is good. Its the tune. My tuner was able to fix the vtec dip but it took him 3 hours to do so

 

Thanks everyone for the feedback, I will look at the Vtec silinoid and oil pressure line. Any other info would still be helpful but I got some places to start.

 

Let us know if you find the culprit. I am going to double check both of those on mine also.

 

Revenge, I seem to have solved my problem. Check the oil pressure switch connection wire. Mine was tight but whatever it was tightened to in the pressure switch itself would move slightly. I just rotated it until it was tight and took the car ofr a spin and now VTEC feels like it is engaging as where before it would stink past 6K.

 

My car felt better than before yesterday but this morning I did a pull getting onto the freeway and it didn't feel as good. It just wasn't pulling much at all in forth gear in the higher revs.

I REALLY need my high flow cat from Berk (Please Berk! ), so I can throw the wideband on to make sure all looks well and then get it over to a tuner.

 

BUMP for Revenge.

Any updates?