I'm going to try and give as many details as I can. Basically for the past week, when time permits, I have been helping my friend Alberto, he is on the board, figure out a problem he is having. The problem is he is leaning out in boost from about 6lbs on. When I say leaning out I mean 13:1 with no end in sight. KPro cuts due to the lean protection. The car didn't have this problem when it was tuned. It had all kinds of problems though. One major problem was that the fuel line setup was horrible due to the installation. That was fixed for the most part. We have tried switching out the FPR (Aeromotive), switching out the fuel pump (Walbro 255 HP), switching out the ECU (KPro), adding 10%/15%/50% fuel in the corresponding cam angles, checking over the wiring, using a vacuum manifold, switching out the wideband and a couple other little things. Going to try switching out the 998cc injectors for another set of 998cc injectors this week. I know there are more than a couple knowledgeable KPro/RSX people and tuners in general on this board. Suggestions would be much appreciated

 

Burn the car to the ground and **** on the ashes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blown90hatcH &raquo;</TD></TR><TR><TD CLASS="quote">Burn the car to the ground and **** on the ashes </TD></TR></TABLE>

hahaha

Did I forget to mention we had to restrain Blown90Hatch from doing this?

 

First make sure that fuel pressure is rising at 1:1 in boost. If thats good then open a datalog and watch the injector pulse as you are going into boost make sure its actually trying to give it more fuel as the manifold pressure increases.

also, are you running inline resistors or a resistor box for the injectors on this vehicle?

 

resistor box and 1000cc precisions.

could the 3 bar map sensor have anything to do with this?

the injector pulse doesnt seem to be trying to rise when I go lean it goes to like 5 but not like it does when its all fine it goes to like 12 when all is good

 

did you just switch to the 3 bar? connect to the ecu and make sure map sensor type is set for a 3 bar sensor. I have seen gm map sensors go bad before so that is a possibility. just make sure the map sensor is reading right, look at a datalog and make sure the map isnt erratic.

 

ok the map seems to be reading apropriately so is there anything else to take a look at while trying to diagnose? the 3 bar was used to tune the car on the dyno so should be ok BUT we did have some issues with the map sensor and the stupid little pigtail it comes with , its a GM 3 bar. any other troubleshooting I can do to diagnose if the map sensor is ok?

I have heard about the injector pulse, if I add fuel to the maps in boost should the pulse go up or down?

It is a strange problem where we add fuel yet the car stays lean or goes even leaner. been a pain to try to diagnose the problem.

anything else I should check for? the fpr is 1:1 rising with boost aeromotive, seems all good its 35psi at idle with vacuum source and goes up 1:1 with boost.

Any way to tell if an injector is not working ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jsimon9633 &raquo;</TD></TR><TR><TD CLASS="quote">Any way to tell if an injector is not working ? </TD></TR></TABLE>

Check the plugs, if the injector's misfiring it should show up on that cylinder.

 

I already pulled the plugs what should I look for?

 

did u put new plugs in?? and have u properly tested the 3bar??? oh and ur gay diaf

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jsimon9633 &raquo;</TD></TR><TR><TD CLASS="quote">I already pulled the plugs what should I look for?</TD></TR></TABLE>

The good plugs should look light brown. One of the plugs will look different, lighter or darker depending on if it's lean or rich.

If you add fuel injector pulsewidth should go up - injector pulsewidth is how long the injectors are held open for.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">

The good plugs should look light brown. One of the plugs will look different, lighter or darker depending on if it's lean or rich.

If you add fuel injector pulsewidth should go up - injector pulsewidth is how long the injectors are held open for. </TD></TR></TABLE>

No. Injector pulse width is how many milk shakes he is going to be buying me. I have had a suspicion as to what the problem was. He hit the dyno today and my suspicion was correct. Going to meetup Thursday or Friday to see if it holds true. Will update then.

 

I hope thats the case lol

even though I swapped the stock wideband with my boys stock wideband and it did the same thing, not sure how that works out but well see