Rob91
Registered User
I replaced the inlet manifold some time ago (because I damaged one of the bolt holes for the SC –stuck bolt.. ). After I had it back together I made a few runs with my G-tech and noticed I had lost about 20-30 RWHP (from approx. 200 to 175). From the G-tech data it seems like I loose power under WOT from about 2500 rpm. I checked everything, and ended up taking it apart again down to the inlet manifold but left it in place as I didn’t have new gaskets. But same result! Funny thing is that it runs great, idle is ok (perhaps a bit rough) and no codes! KOEO, KOER and cylinder balance test renders only 111 (system pass).
Now I’ve got a scanner (well spent money!!) and I’ve done some tests. The data in the table (attached picture) are from a test I did today (driving at 2000 rpm in 2nd gear and then floored it.
I wanted to check the base timing also (at idle), so I pulled the “Spout” plug: I expected the timing to drop to 10-12 degrees, but it raised to about 30 degrees and then gradually fell back down to roughly 21-22 deg. Should it do that??
Other info: TPS, ECT, ACT, IAC are new –and never made any difference.
Now I’ve got a scanner (well spent money!!) and I’ve done some tests. The data in the table (attached picture) are from a test I did today (driving at 2000 rpm in 2nd gear and then floored it.
I wanted to check the base timing also (at idle), so I pulled the “Spout” plug: I expected the timing to drop to 10-12 degrees, but it raised to about 30 degrees and then gradually fell back down to roughly 21-22 deg. Should it do that??
Other info: TPS, ECT, ACT, IAC are new –and never made any difference.