overboost

[Black Knight]

Re: overboost

IMO ghettosled is right when he says knock can cause that, also a cat-delete can bring the stock WG to it's limit (ask me *gg*) and cause such issue.

I ran the truck once or twice before with a scan tool and it was only getting 1-2* of KR at WOT, maybe mostly on the shifts, I can recheck this. It still has the cat in the truck, the turbo I got from Waller has the WG ported so from his info he said I can run even without a cat and shouldn't have a issue, but at present its still in the truck.

please answer me again - do you have an aftermarket boostgauge (how sharp are the measurements) ?

Yes, its a Autometer, it's only a 20psi gauge so I can see fairly easily exactly what psi I'm at to the 1/2psi.

crappy boost can also be caused by bad solenoid (sometimes), are you sure your FP / AFPR does fine ?

My FP is set a 42.5 psi, but at present I don't have a adjustable FPR, nor a gauge so I can't honestly tell you if the FP is raising with the boost like it's supposed to.

What would be a sign I could look for, KR???

if so - go back to start and test the vac - easily when engine warm , at idle : spray all your vaclines w/ brake-cleaner or carb-cleaner and listen for different idle - if then idle goes up youre the winner - fawked vac-system ...

I replaced all the vac. lines about 6-8 months ago, I can definitly go through and do it again.

disconnect the vacline from solenoid to actuator (WG = enalbled) - build boost , NO wot, easy on the right leg - see if it makes 15psi ... if not it should be a boost leak and boost is creeping > WG is fawked or way out of tolerance - if it does fine - do the vac

I just did this on accident the other day and yes at a 1/4 throttle it jumps right to 15psi.

when did you refresh the ignition (plugs, wires, cap+rotor, module) ?

About 6-8 months ago, might be time to do again, I did run it down to Cali this last summer and it was 120* and it didn't like it at all, maybe something got cooked??

Thanx for the help with this guys! :tup:

EDIT: What do I need to do to get the base boost set at 8psi, the is wg actuator rod is screwed all the way in and only makes 5-6psi, now what?

 

[dirtdemon]

Re: overboost

EDIT: What do I need to do to get the base boost set at 8psi, the is wg actuator rod is screwed all the way in and only makes 5-6psi, now what?

... swap actuator :roll:

go out and get a press-tester for fuelpress :tup:

HTH,pat.

 

[Black Knight]

Re: overboost

... swap actuator :roll:

Well that's what I was guessing, but I didn't know for sure.

I have a FP tester, I just don't have a gauge in truck to tell me if the pressure is raising accordingly.

 

[dirtdemon]

Re: overboost

Well that's what I was guessing, but I didn't know for sure.

I have a FP tester, I just don't have a gauge in truck to tell me if the pressure is raising accordingly.

but the tester should do fine also, just get a friend for help :tup:

regards,pat.