I'll try this again

graham1524

graham1524

Well-known member
I'm on spring break so have a chance to try and get it right. My truck runs good but after letting it idle for a little bit it runs rich, give it some gas and after a couple revs the check engine light will go off it's a code 34. While driving it runs strong up to about 3000 rpm's (only run this high for tunerpro log) where it goes lean, knocks a little and starts pulling timing but doesn't throw a code. I can send logs if needed.

I have the walbro fuel pump but other than that it's all stock.
 
Bill Z

Bill Z

Donating Member
Re: I'll try this again

My money is on the EGR valve. Probably needs to be cleaned or replaced.

Now, lets finish the diagnosis.
 
graham1524

graham1524

Well-known member
Re: I'll try this again

I got the silicone vacuum lines not long ago. I'm not so sure about the EGR, injectors or fuel pressure, how could I determine if either of those were the problem. I would have to assume it is still the stock fuel pressure regulator.

And not sure if this has anything to do with it or not but tunerpro doesn't show it "entering" boost the kpa goes up but the boost graph stays the same.
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: I'll try this again

graham1524 said:
I got the silicone vacuum lines not long ago. I'm not so sure about the EGR, injectors or fuel pressure, how could I determine if either of those were the problem. I would have to assume it is still the stock fuel pressure regulator.

And not sure if this has anything to do with it or not but tunerpro doesn't show it "entering" boost the kpa goes up but the boost graph stays the same.
Click to expand...

It doesn't show it going into boost, then you should track that problem down first (Map Sensor)
 
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