New 38 lb injectors installed: now B2 is lots richer than B1, what should I check?
09-05-2004, 04:09 PM
#1
New 38 lb injectors installed: now B2 is lots richer than B1, what should I check? I installed the 38 lb injectors supplied with a new Vortech supercharger kit. I don’t know if they are Bosch or Lucas, I don’t know if it matters. The supercharger isn’t installed yet: because of little free time I have to install the kit making little steps.
I changed the IFR table as Vortech does with the programmer they supplied.
Result: bank 2 is now richer than bank 1: load cells about 5% less, non load cells like 0, 1, 2, 19 and 21 are about 10% less (LTFT).
I’m sure that the install went fine: no troubles, all clean, I really paid attention.
I already have installed the additional fuel pump: I used it with the stock injectors and it was fine.
What can be wrong? How can I check the injectors?
Maybe one injector is stuck open and the bank show a rich condition, or maybe the other bank has a blocked injector and that bank is leaner…
The car is running well, no KR, no overheating.
Hope someone can help!
Thanks - Stefano
I changed the IFR table as Vortech does with the programmer they supplied.
Result: bank 2 is now richer than bank 1: load cells about 5% less, non load cells like 0, 1, 2, 19 and 21 are about 10% less (LTFT).
I’m sure that the install went fine: no troubles, all clean, I really paid attention.
I already have installed the additional fuel pump: I used it with the stock injectors and it was fine.
What can be wrong? How can I check the injectors?
Maybe one injector is stuck open and the bank show a rich condition, or maybe the other bank has a blocked injector and that bank is leaner…
The car is running well, no KR, no overheating.
Hope someone can help!
Thanks - Stefano
09-09-2004, 08:26 PM
#4
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You need to get them flow tested then you will have a definate answer. . . If one is going bad or even just a bit weak you dont want to run the blower on it . Its enough to lean out 1 cylinder and 
Im having a hell of a time with some 42.5's right now also.
Im having a hell of a time with some 42.5's right now also.
09-10-2004, 01:12 AM
#5
I checked them yesterday: the lower has 37.5 and the higher 38.6 lbs/hour (-1.3 and +1.6%). No leaks, no blocked injectors. Spray patterns are all the same. I guess it's fine.
THis is good but now I don't know what to check. I run Atap everyday to see: with the stock injectors B1 and B2 have really just small differences.
Is there a wrong way to install Injectors? I mean, what can be wrong?
Seats were clean and lubricated
O-rings were fine
Sockets were fine
fuel rails have been bleeded
idle was fine
...
Unless 5-10 % difference between the banks is fine...
something more: I marked the injetors. Just looking at the flows the difference between the banks is only 0.4%, so I don't understand why the LTFT are so far away.
THis is good but now I don't know what to check. I run Atap everyday to see: with the stock injectors B1 and B2 have really just small differences.
Is there a wrong way to install Injectors? I mean, what can be wrong?
Seats were clean and lubricated
O-rings were fine
Sockets were fine
fuel rails have been bleeded
idle was fine
...
Unless 5-10 % difference between the banks is fine...
something more: I marked the injetors. Just looking at the flows the difference between the banks is only 0.4%, so I don't understand why the LTFT are so far away.
