MY Newly bought SR is running RICH....I think

[RFcool]

What up guys. Just popped the cherry on the SR engine finally and bought a great car from REPO MAN on here. anyhow, he did some trouble shooting and said that the car has an incorrect A/Fuel ratio or something of that nature. Anyhow i know nothing about these engines since i havent ever owned/built one. Im familiar with the KA-T builds that ive done but this is a new one. here is the link to the car i bought

zerothread?id=384937

Anyhow, Andy is a cool cat and i really want this car to run and run well. Not going for any high power or anything along those lines until its tuned properly to begin with.

Any help would be appreciated.

The car is a bone stock SR swap, all of it was done correctly and has no aftermarket mods on the engine other than the SR items.

Thanks

[snake240]

i looked at pics and cant tell if you have the stock bypass valve. if you dont, you need one. id go w/ a greddy type rs and recirculate.

[bassboost]

Well from all of the things i've learned from trying to fix my rich problem, here's what I can tell you to check/do...

Clean MAFStock catalytic converter?Leaky InjectorsBad FPR?Vacuum Leak?Bad sensors? (O2 & Coolant Temp Sensor)Leak somewhere from intercooler piping?

What are the AFR readings on the car? Also, is it a wideband or narrowband gauge we're looking at?

[RFcool]

yeah gonna check injectors when a friend gets here. The exhaust isnt on the whole thing yet, no catalytic converter on it. the exhaust is a BRM exhaust. IM gonna clean the MAF here in a few mins. As for the FPR im trying to get a nismo one for it. But trying to find one less than 100 dollars...lol. But afr i dont know yet still hookin up guages to read everything. I was just trying to trouble shoot a few things before i dug into it. But i will keep ya posted and hopefully you can help me through this tragic dilema.

[RFcool]

okay. So i did some checking today. NO LEAKY injectors. MAF is clean. So when i went to start it up, it would crank and crank but no turn over on it. So i pulled plugs and found oil on them, but no oil in the well.

[bassboost]

Did the motor run before you got it?

Hows the compression on it?

*edit* Also..you can pick up a Megan Adjustable FPR for like $75 shipped...?

[RFcool]

yeah the motor runs fine, revs and idles just fine. But goes rich under load. thanks on the tip on the megan FPR.

[bassboost]

Hmm...So it runs currently, just rich under load..hmm.

Try testing the FPR?

Take off vacuum line on it, put finger on it, if rpms of motor go up, FPR is good, if nothing happens FPR is bad...

Whats your vacuum reading at? No leaks anywhere from lines or intercooler piping?

[RFcool]

okay so i put new plugs in it, cleaned maf again. Now shes reving hi, but cant tell how hi due to the rpm tach not working. But as for the fpr test will do it in just a bit. the boost gauge i hooked up on the throttle body is reading 10 vacuum not press. so maybe that helps, but i will check on the fpr.

[bassboost]

Hmm...thats pretty low vacuum for that...my SR vacuum is about 20-22...that number is consistent thru 2 diff gauges..?

Hows the coolant level??

[RFcool]

coolant level is good on the car, but i dont want to keep it running in risk i might mess something else up on the engine. Im getting so damn frustrated with this damn engine. I miss my KA-T at least someone at a shop could help to a degree since its the US engine. where do you run your vacuum line off of BASSBOOST?

[bassboost]

Its running off my intake manifold..

IIRC, my vacuum line runs as follows, sorry for crappy quality, i tried my best to describe haha!

[RFcool]

bro it works and thats the same setup im running but im not running a manual or electronic boost controller on my ****. But as the FPR stands im going to check that finally tonight ive been tied up on the whole thing and needed to take a break from it for an evening. But thanks for that diagram, maybe you should post the pic on a forum for all the noobs to know what to do....lol

[bassboost]

hahaha! alrighty, keep us updated

[RFcool]

okay news update. The FPR is good, but from what ive been reading, i have a walbro 255 pump in this car that could be overpowering the fpr. So maybe i should get that new fpr soon and than see whats going on.

[bassboost]

Hmm....I have a walbro 255 too...with stock FPR.

You really need to get a wideband hooked up bro , cause SR's do run rich stock..

[RFcool]

i still cant figure out why my vacuum is running at 10. But i do have a stock BOV thats being recirc. next to the stock sidemount intercooler. Do you think i should go in a check the timing setup. I found here on NICO how to do that, maybe thats what could be throwing everything off. Thanks bassboost for your help so far and you other guys too.

[RFcool]

WIDEBAND COMING SOON woot, just ordered it

[bassboost]

Veryy nicee, that wideband will help you a good bit with possibly pinpointing this problem. I'm not really sure if the timing would make the car run rich or not? However it wouldn't hurt to just check to see if everything is good just for peace of mind ya know?

Hmm...sure the intercooler piping isn't leaking somewhere???

[RFcool]

Hmm...So it runs currently, just rich under load..hmm.

Try testing the FPR?

Take off vacuum line on it, put finger on it, if rpms of motor go up, FPR is good, if nothing happens FPR is bad...

Whats your vacuum reading at? No leaks anywhere from lines or intercooler piping?

Did the finger test. Finger test says FAIL!! so i think its FPR thats contributing to the issue. Now the car starts up and revs up high (tach doesnt work atm) But than idles down slowly and dies. and also what could be causing my vacuum to run at 10-12

[bassboost]

Definately could be contributing to your problem.

Uhm as far as I know..a vacuum reading low could be created by only vacuum leaks:

Intercooler piping couplersConnecting at throttle bodyConnection at compressor side of turboHoles in intercooler pipingLeaking at intercooler coreLeaking vacuum lines in diagram below..

Thats all I can think of..perhaps bad boost gauge too?On your vacuum lines..none of them are cracked, dry rotted, or anything?

[SullivanRacing06]

check for vac leaks/ boost leaks

[RFcool]

ill be taking all the piping off this weekend and redoing it all. I have a second smic that i will swap out. But vacuum lines are all new, so hopefully by swapping a few things and rebuttoning that all up, i can eliminate on problem. Than its just waiting on the FPR and Wideband.

[RFcool]

okay tomorrow im heading to Lowes and buying the parts for a boost leak tester. That should tell me precisly whats going on with the piping and leaks.

[bassboost]

Any news?

[RFcool]

nope not yet. way to cold outside to be in the garage. y little heaters cant keep up with the below temps outside. lol. but i will be posting back up when i get my parts and also some more progress on the situation. thanks for following up with me.

[bassboost]

Yeppers..I know the feeling of troubleshooting an impossible looking problem, and actually figuring it out haha!! So, I figure I'll try my best to help ya out..since the problems are quite similar hahaha!

[RFcool]

okay. Got the vacuum problem fixed. Im sitting at about 20-22 vaccuum now. But still running rich. Sounds like its revving high just idling than just dies out after a minute or 2. Still havent fixed the boost problem yet. Could it be that since the exhaust isnt fully on yet that its not getting any back pressure? I have my new nismo FPR on now but dont know how to adjust it due to having no gauge...lol. Anyhow waiting on the Wideband still. Got my new Greddy BOV and OBX catch can.

[Logan76]

thats a Negative on your exhaust theory, a Turbocharged car doesnt need backpressure, therefore theoretically you could run it with no exhaust, or open DP and still have similar results.

[RFcool]

so annoying. and thanks for the input on the exhaust. At least thats another thing i dont have to worry about. thanks