MrFairlady
04-10-2012, 09:28 PM
Recently My cars(S14 with redtop SR) Gotten worse when 1st starting up Cold from sitting overnight or 4-7+/- hrs.
Only new Item installed is a Blitz VD Blow off valve kit.(Recirc Kit ordered yesterday to help) but even before I ran No Blow off it did it.
** Its never had much of a Cold idle (like my other S13) - More on that.
----------------------------------------
::::1st start Up it idles (1300-1400rpms) ok for about 5-7 sec's and then A/F's go lean,RPMS drop and nearly stalls. It will Just Stay alive and Then idle up a bit,..couple sec's again and it tries to stall again.Pressing the gas it tries to wake up but struggles when gas is given..then revs back up to 1400+/- and Then finally stabilizes 1000rpms and Its Good from there for the most part. it and takes about 2-3 cycles of this above and then its good.
**Only When Starting it up after sitting for a bit.
My car has Never had much of a Fast/cold Idle Bump since its been running so I have no clue where to start next.
Diagnosis:
TPS is set (my 1st thought)...timing is set,No vac leaks,Tried 2 diff Z32 Maf's, but the IACV...well I'm not sure. I feel like that and maybe the Coolant temp sensor may be the culprit but No Codes for either using datascan.Not sure how to Test the IACV to know what to look for.
With the Blowoff installed I do occasionally get the bog/low idle when coming to a stop after driving for a while but not all the time.Recirc ordered.
Enthalpy Tuned ECU for my Setup:
Redtop 2871,850cc Sard injectors,tomei Pon 256,Z32 Maf,Apex'i intake,Walbro,Tomei FPR,FMIC with S14 Blitz VD Pipe kit(new) No leaks,Runs Fine Otherwise.
S13 SR to S14 chassis Wiring Specialties harness also.
Only thing I can think and have noticed is that outside temp affects This.when it was colder out,it didn't seem to be this way,but now that its warmer A.M & P.M now Its an everyday occurrence.Thought air Knock off HKS Style Filter I had was the Issue back in JANUARY, since removing the Filter entirely It was Perfect but you couldn't drive it due to it being SO RICH,..so i bought an Apex'i Power filter Months ago.Seemed to help a little.
any help??
Is the car supposed to Idle at 15degrees because datascan shows 9 when Idling at 1000-1100. I can hit Perform idle mode and boom: 15degrees.
Though I still can't get the idle Below that or it runs somewhat rough.
Only new Item installed is a Blitz VD Blow off valve kit.(Recirc Kit ordered yesterday to help) but even before I ran No Blow off it did it.
** Its never had much of a Cold idle (like my other S13) - More on that.
----------------------------------------
::::1st start Up it idles (1300-1400rpms) ok for about 5-7 sec's and then A/F's go lean,RPMS drop and nearly stalls. It will Just Stay alive and Then idle up a bit,..couple sec's again and it tries to stall again.Pressing the gas it tries to wake up but struggles when gas is given..then revs back up to 1400+/- and Then finally stabilizes 1000rpms and Its Good from there for the most part. it and takes about 2-3 cycles of this above and then its good.
**Only When Starting it up after sitting for a bit.
My car has Never had much of a Fast/cold Idle Bump since its been running so I have no clue where to start next.
Diagnosis:
TPS is set (my 1st thought)...timing is set,No vac leaks,Tried 2 diff Z32 Maf's, but the IACV...well I'm not sure. I feel like that and maybe the Coolant temp sensor may be the culprit but No Codes for either using datascan.Not sure how to Test the IACV to know what to look for.
With the Blowoff installed I do occasionally get the bog/low idle when coming to a stop after driving for a while but not all the time.Recirc ordered.
Enthalpy Tuned ECU for my Setup:
Redtop 2871,850cc Sard injectors,tomei Pon 256,Z32 Maf,Apex'i intake,Walbro,Tomei FPR,FMIC with S14 Blitz VD Pipe kit(new) No leaks,Runs Fine Otherwise.
S13 SR to S14 chassis Wiring Specialties harness also.
Only thing I can think and have noticed is that outside temp affects This.when it was colder out,it didn't seem to be this way,but now that its warmer A.M & P.M now Its an everyday occurrence.Thought air Knock off HKS Style Filter I had was the Issue back in JANUARY, since removing the Filter entirely It was Perfect but you couldn't drive it due to it being SO RICH,..so i bought an Apex'i Power filter Months ago.Seemed to help a little.
any help??
Is the car supposed to Idle at 15degrees because datascan shows 9 when Idling at 1000-1100. I can hit Perform idle mode and boom: 15degrees.
Though I still can't get the idle Below that or it runs somewhat rough.