Rocker INstallation gone AWRY!!!

Subject: Rocker INstallation gone AWRY!!! Wed Aug 20, 2008 2:21 am

Ok ill keep it to the point... I installed the 1.8:1 rocker arms in my 97 riv. Current mods are, 3.5' FWI, PLOG, 3" downpipe w/ hi flo cat, TB spacer, 180 deg thermo, 3.4" pulley, autolite 104's, and an INTENSE PCM. Since the installation, My aeroforce gauge tells me that my LTFT's (which were at 0.0 at idle and 3.8 at cruise) are now at -20 at idle and -3.6 at cruise, after a 30 mile relearn. Therefore, the car idles rough and is very hesitant once revved. There are no noises or knocking sounds though the knock retard did kick in a few times at and around 50 mph..Also its chronically throwing a P0102 (mass flow sensor) and a P0341(cam position sensor) check engine codes! so I'm at a loss to either get a new tuned PCM or just reinstall the old rockers.. bonk

any ideas?! thanks guys!

Subject: Re: Rocker INstallation gone AWRY!!! Wed Aug 20, 2008 3:24 am

I had those same two codes and they were both a wiring problem between the ICM and PCM. I also have a 97 supercharged.

Subject: Re: Rocker INstallation gone AWRY!!! Wed Aug 20, 2008 9:14 am

Something happened during install. Check your vacuum lines and wiring are connected properly. A different rocker ratio shouldn't create the problems you describe. In other words, if you put the old rockers back in, you will most likely still have these problems.

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch
^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown

Subject: Re: Rocker INstallation gone AWRY!!! Thu Aug 21, 2008 12:11 am

changing to the old rockers will likely not fix the problem. try cleaning the MAF, rechecking all connections, and maybe switch back to the stock pcm temporarily to see if it helps your numbers.
good luck

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1996 with 254k miles, L32 4" FWI -> ported N* -> Ported Gen V w/3.0" Pulley, Stage 3 Phenolic I/C, ZZP FMHE, 1.84 RR, Headers and 3" pipe to mufflers, F-body brakes, and lowered on Eibachs. -RIP
AMG C400 White on black. Stage 2 w/E30 - 11.9@117 -daily
Rocker INstallation gone AWRY!!! Dsc_0110

Rocker INstallation gone AWRY!!! Dsc_0110

Subject: Re: Rocker INstallation gone AWRY!!! Thu Aug 21, 2008 4:50 am

check the back fuel pressure thingy........ i left mine unplugged! wHOOPSIES

Subject: Re: Rocker INstallation gone AWRY!!! Thu Aug 21, 2008 9:58 pm

Sounds like a disconnected ground, or unplugged harness somewhere... it's running in limp mode DON'T STEP ON THE GAS until you figure this out.

Subject: Re: Rocker INstallation gone AWRY!!! Fri Aug 22, 2008 3:00 pm

Well... here's what I'm up to soo far... I used my GM service manual for the car..( if you guys need any scans once i figure this out let me know...) an my MAF is not putting out any signal to the PCM. Its getting voltage but only a signal of about .3v seems to come out (if any) I replaced my INTENSE PCM with the original and still the same codes.. also I ran to advanced auto and picked up a new MAF for the hell of it and still nothing.. Turtleman.. could you tell me where your wiring problem was? I even re sanded the ground under the ICM and still nothing.. And 98rivera98... what back fuel pressure thingy where you talking about? lol