EA82 turbo hesitation

boyce · Post by **boyce** » Fri Mar 28, 2008 9:28 am

Ok here it is the problem:
Under full throttle or partial throttle, engine feels like it is hesitating or misfiring at 2800-3200 rpm, below or higher than this range it runs perfect.

What I have done:
Checked operation/cleaned connections for:
Thermosensor (coolant temp sensor)
Oxygen sensor
EGR solenoid/Egr valve
AFM
Ignition timing
Turbo plumbing
Vacuum hoses (all)

Replaced:
Plugs
Wires
Cap
rotor
Fuel filter

Things I havent tried/changed:
Coil
What else?????

This problem is driving me nuts, somebody give me a helping hand!

marshy · Post by **marshy** » Fri Mar 28, 2008 7:19 pm

Is this the same car you have a "starting problem with but runs fine".
Or has this happened after you code problem?

steptoe · Post by **steptoe** » Fri Mar 28, 2008 11:24 pm

fuel pressure during a road test not just free revving on the spot

boyce · Post by **boyce** » Sat Mar 29, 2008 3:31 am

marshy wrote:Is this the same car you have a "starting problem with but runs fine".
Or has this happened after you code problem?

Fixed starting problem, it always had this issue since I bought it a few weeks ago, I thought it was bad fuel... but no......

SubaRute · Post by **SubaRute** » Sat Mar 29, 2008 5:54 am

get the injectors cleaned?

boyce · Post by **boyce** » Sat Mar 29, 2008 6:17 am

SubaRute wrote:get the injectors cleaned?

nope.. woudl dirty injectors only cause a misfire at 2800-3500 rpm?

Gannon · Post by **Gannon** » Sat Mar 29, 2008 6:49 am

I second fuel pressure, i had a very similar problem where it would stumble at 3100 rpm

schultzie · Post by **schultzie** » Sat Mar 29, 2008 9:43 am

what size spark gap are you running?
if you are running 1.1 like the FSM states then close them to 1.0, i run mine at .9
i was getting detonation at high loads at a similar range rpm and this fixed it...

boyce · Post by **boyce** » Sat Mar 29, 2008 9:53 am

schultzie wrote:what size spark gap are you running?
if you are running 1.1 like the FSM states then close them to 1.0, i run mine at .9
i was getting detonation at high loads at a similar range rpm and this fixed it...

Standard fsm 1.1
Could I upgrade my coil instead of re-gapping?

schultzie · Post by **schultzie** » Sat Mar 29, 2008 10:07 am

i guess so, honestly just givve it a whirl, ive had mine gapped at .9 for almost 2 years now and havent had a problem yet. if it isnt the problem then look at fuel again.

my senario might be wrong because i am running more boost and no factory wiring, all after market.