TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

Hesitation after warm up help!!

Thread Tools
 
Search this Thread
 
Old May 10, 2011 | 05:07 PM
  #1  
seiplentz's Avatar
Thread Starter
Member
20 Year Member
iTrader: (2)
 
Joined: May 2003
Posts: 445
Likes: 6
From: Delco pa
Car: 85 Z28
Engine: GMPP 350 HSR
Transmission: 700R4
Axle/Gears: 4th gen 3.42 Posi LS1
Hesitation after warm up help!!

So heres the issue after it warms up it will hesitate until about 2500 rpm and then clear up. Runs perfect until it seems like it hits closed loop mode.

Last night I ran a couple wires into the car to monitor the maf and o2 sensors the 2 I suspect.

Now the voltages on the maf seem ok was about .5 and then up to 2.5 or so when I was revving it a little.

The o2 was was running around .470 at idle and .700 when cruising and it would drop to .023 when coming to a stop then jump back at up. It also seemed to take a while to come back down after the throttle was goosed.

Please help this is really getting on my nerves. I want to go megasquirt but need to fix this first I can't convert with a possible known bad sensor somewhere.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Fanatic1074
Tech / General Engine
45
Oct 3, 2022 05:57 AM
RedLeader289
Tech / General Engine
10
May 28, 2019 01:47 PM
HoosierinWA
Tech / General Engine
5
Oct 7, 2015 10:15 AM
thejimsterz28
TPI
4
Sep 30, 2015 08:52 PM
mfp189
Transmissions and Drivetrain
1
Sep 27, 2015 09:25 AM




All times are GMT -5. The time now is 10:19 AM.