my ca is still running rich

[willystyle240]

i have a nissan 240sx with a ca18det in it and the motor is running so rich that it fouls my plugs with in 15 to 20 min. ive replaced all 4 injectors with factory siz injectors replaced both temp sensors checked cam timing over and over again checked all my wireing and i have no codes and cleaned my mass air flow sensor and the motor still runs rich.
Modified by willystyle240 at 1:16 PM 1/28/2008

[capowered240]

What about o2 sensor?

[ca18detgabby]

did you check to make sure you FPR is still good

[willystyle240]

i have changed the o2 but i didnt think about the fpr ill check it and let you guys know. thanks oh and how can i tell if the ecu is the ca18det ecu.

[ca18detgabby]

There is a number on the outside of the ECU

[biosehnsucht]

What MAF are you using? Stock ECU? Are the injectors low impedence injectors like factory, and you are using a dropping resistor on them? Or are they high impedence ? They are exactly stock replacements, or crappy Venom or w/e aftermarkets? Is the ECU throwing any codes? Knock sensor is hooked up ?

[willystyle240]

the ecu and maf are the stock oem parts yes the injectors are low impedece and origionall size 370cc and yes they are venom. and i have the the resistor on them and no fault codes what so ever have not checked the knock sensor it may have come unplugged the car did run then all the sudden it just went to crap.

[willystyle240]

There is a number on the outside of the ECU

will it say ca18det or should i be looking for a nother number

[biosehnsucht]

venom is crap, I've seen many reports of people getting venom injectors that just stick open or closed or all kinds of jacked up ****.

if you have the original injectors, you might send them off to someplace to be cleaned/tested and hope they will come back OK.

Also, check the fuel pressure. If it's waaay high that'll have the same effect. Be sure it's at 36.3 relative to ambient pressure; easiest way to check is to hotwire the fuel pump relay 'on', put the key in 'on' (don't start the engine) and then check it, should be 36.3 psi.