Thread: Why am I all the sudden running lean?

Yeah when my stock pump was dying the car would cruise ok but too much throttlle on accel an it would cut out an the revs would actually drop. But I didnt have my wideband hooked up so not sure what the afr was at..

Im moving 25 miles away from my current location in 5 days, Im pretty sure i should be ok driving there as long as I granny shift the car under 5k rpms.
She runs perfect out of boost and I dont wanna hurt my engine. It so seems like my walbro is dying.

Its behaving like my stock pump did when it was dying.... At idle normally its like 16-18 now its like 16-18-14-12-10-12-18-16 all over the place
for no reason at idle.

I just need to get her safe to the new location, If my walbro died that fast wtf time for maybe an OEM Z32 pump or alternative its literally got less than 10k miles on it.

Hey guys im moving on Monday and need to get my car to the new house ( 25miles away ) even though shes running lean 15-17 on the wide band can I limp her there safely off boost?
If I shift 3500/4000 she appears to run fine just lean. Ill make sure not to go over 4k rpm and / or hit any kinda boost.

- Replacing TPS asap ( is problematic )
- Troubleshooting Walbro ( at idle the other day goes to full rich then lean randomly seems strange ).

All I did was replace a bad maf, Prior car was running perfect.. TPS has been problematic.

15 to 17 is safe to go 25 miles. It's fine for part throttle

Replaced TPS, Better idle but same sh*t

Yeah shifting 3500/4000 part throttle off boost runs fine.. Just need to get her to my new house then
I can troubleshoot..

Really thinking its this POS Walbro, Just blows less than 10k miles on the pump... As soon as its needs
fuel it feels like it chokes..

Pinch your fuel return line shut. If the pressure rises up.. Your regulator is poop. Worth a shot.

Back from the dead... Havent worked on car all winter, Acquiring another MAF and will be checking Regulator and then look into pump and possibly the relay. Just wanna drive this car already I miss it esp with the guy up the block driving by in his evo alll the time and hearing some nice turbo exhaust noises.

Replace walbro 255 with Aeromotve 320 stealth pump, Problem still present.. Next up " Construct a new intercooler pipe" I have a billet MAF setup so I have an N62 in a billet housing making it a pita to swap mafs... Gonna try another N62 with another pipe... Jeez I just wanna drive the car lol

How did the FPR test go?

Maybe a leak in your IC piping b/w MAF and TB? ...or a bad seal around MAF?