Thread: bog and hesitation problem after turbo install

Lol, patience is a virtue.... I replaced my iacv once before and did nothing to the idle problem i had in my g20. U must have a vacuum leak somewhere... I ended up patching the spot where the iacv goes as it was useless to have it there, once patched and new wires and spark plugs went in, the car was idling like a champ...might want to give it a shot if its not a the shop yet.

im guessing its the tune jwt sent me cause the car was never this bad before im keep trying but ill probably send it to a shop for proper diagnosis

You should try pressure testing your pipes, and check your spark plug gap.also try a different maf. See if that helps.

put new spark plugs in regaped to 32 maf works great cause car runs good after around 3k rpms its like the car is not getting the right fuel mixture when its warm and below 3k rpm im keep trying cause shop charge arms and legs specially on modfied cars cause a take more time cause they dont know whats done to the car

Install an A/F gauge and stop wasting your time with blind assumptions and fixes.................Sheeshhhh!!

All this time wasted on other potential coulda should fixes, but you are not getting a full data stream to analyze..............

With how cheap widebands are nowadays (and even cheaper used), there is NO excuse to install a turbo without a wideband. That should be one of the top things on your list!

I can tell you right now, with my JWT tune, my wideband showed me things I would have never guessed otherwise and helped me diagnose several "issues".

i had this same bog/hesitation issue, and bumped my fuel pressure up and now it doesnt bog anymore... id try that, if u have a dyno u can play with your fpr and see where your A/R is at

did u bump up your fuel psi? and boost leak ck needs to be performed.

update so alot of stuff has happened since i last posted roommate bailed on me so i had to get a second job to pay the bills have had no time to even look at the car but finally had i had some time this week to work on the car first i had to fix a small oil leak on the oil drain "done" and installed the wideband and drove around a bit; here is what i found.

cold start car is running rich at idle when you drive the car normal not driving aggersively it runs lean the car but drive fine only bog after heavy load when you hit the gas hard or produce boost more then 2 psi then the car bogs the car is maxing out at 5 psi when it should be at 11 psi but the car is running really lean after it warms up even at idle when i get a chance im recheck my MAF do a vacume and boost leak check and then idk need to start knocking things off my list of what to check.... fuel pressure is at 4 bar

another update trying to save some for a standalone or one close to that Nismotronic :-)

so i rewired the maf and saw a big improvement WOT its running a little rich like a JWT ecu should but i still get some bogging here and there i also noticed that im getting positive pressure in the crankcase oil is coming out my oil filler cap need to install some check valves. one last thing i did some research and i need to find out if my ecu is usdm or jdm so i can get the right o2 sensor cause this should be part of my problem right? right now i have a 300zx bosch o2 sensor the fat sensor and it fit perfectly on the bb j pipe?

question how to identify if an ecu is usdm or jdm? search but no luck anyone knows

thank for the help guys :-)

http://www.jimwolftechnology.com/wolfpdf/ECU-ID.PDF

It sounds like you are pressurizing you block with boost air. Post some pics of your engine bay. Make sure to get your Pcv, intake piping...