Diagnostic help!
Thread Starter
Racer
Joined: Aug 2001
Posts: 250
Likes: 0
From: Clarksville MD
Diagnostic help!
Long story short:
I have h/c package and many bolt-ons. Includes 37# injectors,vararam,headers,etc.
On my fourth tuner I finally found someone who could tune it!
It's pulling over 400rwhp.
But every third or fourth pull (or wide open throttle on the road) it "flutters" at the higher rpm's. Hard to describe. It just loses a bit of power on&off.
It's not throwing any codes and shows nothing on the diagnostic computer.
HELP! I finally got everything else dialed in.
I have h/c package and many bolt-ons. Includes 37# injectors,vararam,headers,etc.
On my fourth tuner I finally found someone who could tune it!
It's pulling over 400rwhp.
But every third or fourth pull (or wide open throttle on the road) it "flutters" at the higher rpm's. Hard to describe. It just loses a bit of power on&off.
It's not throwing any codes and shows nothing on the diagnostic computer.
HELP! I finally got everything else dialed in.
Thread Starter
Racer
Joined: Aug 2001
Posts: 250
Likes: 0
From: Clarksville MD
Thanks.
How would I confirm a valve float problem?
Also, Last summer I had the wet computer symptom from the AC condensation overflow. Could a faulty PCM be responsible for this intermittent problem with no codes thrown?
Keep replying! I need to figure this out!
How would I confirm a valve float problem?
Also, Last summer I had the wet computer symptom from the AC condensation overflow. Could a faulty PCM be responsible for this intermittent problem with no codes thrown?
Keep replying! I need to figure this out!
Cruising
Joined: Jun 2004
Posts: 12
Likes: 0
From: Bethel Park Pa
I would monitor fuel pressure,put a gauge on the rail.
FI pulse width (scope). Ignition (scope) If they are stable then you are left with valve float .
FI pulse width (scope). Ignition (scope) If they are stable then you are left with valve float .
Last edited by Redspark; Mar 5, 2006 at 08:00 PM.
