justin84turbo

Back story about two weeks ago i picked up a realy clean 84 turbo 50th anniversary for 400$ it would start but idel like crap and died if u gave it gas. Day after i got it home put a nee maf in it and bam started rite up and drove iv fixed 2 vaccume leakes changed oil plugs all the basic tune up stuff only engine mods iv done is boost controller 8psipsi and aem cone filter went to smog it yesterday and it fialed the idel test horably its running ritch at idel but passed the 2500rpm test at 1/8 what its allowed and ideas whats causing it to run so rich at idel??? Iv tried everything i can think of and still nothing changes and no codes on ecu any ideas will help thank u

NismoPick

Welcome to ZDriver!

What specifically failed? HC? CO? Nox? And by how much? What's the limit?

Posting a pic or scanned copy of your emissions test slip would be helpful.

justin84turbo

At idel.....hc: max 120 i got 312. Co: max 1.00 i got 2.31 co2 is at 13.1 o2 .5....im new to this site bot sure how to post pics rite now but im sure i can figure it out and get 1 up today thanks for the quick responce

rogerz

first step download the fsm from xenon. check your tps it is supposed to lean out the mix at idle. do you really not know how to spell or are you just lazy?

unsolicited advice:

Get your battery load tested. Be sure you have clean, tight corrosion free terminals on both ends of your battery cables. Be sure the ground (negative) cable goes to a bolt into the frame before going to the starter. grounding through the starter is not a reliable connection. Z's don't like low voltage. causes the electronics to act funny. it is possible to have enough amps to crank but not enough voltage to run the electronics. If you have one size fit all cheapo clamp on terminals they are a problem waiting to happen.

Clean the connectors for the maf or afm, ecu and tps. Deoxit by CAIG is probably the best connector cleaner on the market. spray with CorrosionX after cleaning and before putting together this will help prevent any further corrosion

justin84turbo

Yes i can spell im just at work and responding on my phone. Yes i have my ground going to my frame then branching off from there. I will be checking my tps when i get home from work. I have already downloaded a fsm.

justin84turbo

Ok i checked the tps and it was prraty nasty in there. I cleaned out the sensor and plug as good as i can. Im thinking of just replacing it just so i know that not my issue also having a 3inch down pipe made monday so i can put a wide band o2 sensor on it and help me see whats going on

AZ-ZBum

Looks to me like you need to replace the cat.

justin84turbo

Ya that is also possible but in my mind if the cat was bad wouldnt it also affect the 2500rpm test also not just idel thats why i was leaning towards a bad sensor of some kind. Ill be going to the junk yard tomarow for some stuff also they have a 75 benz 450 series is it true that they have 420cc injectors if so ill proba ly pick them up for future plans

justin84turbo

My car has also been getting around 13mpg thats if i stay out off boost mix of in town and free way i feel i should be getting at least 18 or better if im not boosting it all over the place did compression test last it was 150-155 across all cylinders