If an injector I doubt its electrical. I'd suggest blue printing the injectors.

http://www.school-information.com/fu...ors/42884.html

 

OK I looked at the log, could be a injector or sensor. If you have egr or a air pump disconnect or disable them and log again and make sure that is not giving you a problem.

 

I dont have air or egr from the factory. I swapped 02's and it reads the same. I guess it could be a difference in rail pressure also or an injector. Whats the easiest way to measure rail pressure individually?

Any other input on narrowing down which injector?

 

Is it just on forced induction that the #7 always runs leaner. I know its more of a problem with FI though. I don't even know if #7 corresponds to the bank that is running leaner with you.

 

Supose you could pull injector off the B1 side one at time and swap out to the B2 side and log. When/if B2 goes lean you'd have it.

Possibly read the plugs, if it is one cylinder/injector I think that plug would show indications of lean. White plug end vs a good tan to black for normal to rich. Do a WOT run and pull over immediately to pull the plugs and look. If you drive it any chances are it will soot over from normal driving.

Thermal temp gauge on the exhaust manifold. Look for a cylinder hotter than others.

 

thats a great site 90 bucks to have 8 injectors cleaned and flowed seems resonable, now I just need some replacements while I send the old ones out. Id rather just find the faulty one and buy a new one to replace it. Thats a good idea on the plugs it just might work.

Have you seen any temp guages that would be applicable, something I could just stick on each header tube?

 

One of the infra red units should do the trick. Sears has them. Just put the beam on the header.

 

its worth a shot Ill just return it if its inconclusive, how many degree difference would you think between the cylinders for running lean any guesses?

Anyone know what the best way to measure individual rail pressure is?

In the end Ill probably just end up sending all 8 out to get flowed and cleaned I dont know why I didnt do this before I put em in

 

Aren't the rails joined by a common pipe which equalizes the pressure?

 

NO idea for temp differences. I'd do all 8 just to see if drivers/B1 is on average higher, then start looking at the highest temp on the drivers side.

If 02's are the same as the my 03. fuel is fed up to the drivers side fuel rail which then feeds accross the manifold to the passenger. Fuel pressure is regulated via the FPR on the drivers side. I do not see anyway the fuel pressure could be lower on the drivers side than the passenger. They would have to be at the same pressure. Don't take my word for it though.... test it if you can. There should be a schrader valve on the drivers side rail... not sure about the passenger.

Good luck