# Sr20DET running rich: timing-idle-injector q's !URGENT!
**URL:** https://forums.speedlife.net/t/sr20det-running-rich-timing-idle-injector-qs-urgent/97837
**Category:** SON240sx Automotive
**Created:** [July 11, 2006, 12:49pm UTC](https://forums.speedlife.net/t/sr20det-running-rich-timing-idle-injector-qs-urgent/97837 "2006-07-11T12:49:52Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@steve\_s14](https://forums.speedlife.net/u/steve_s14)
#### Post date: [July 11, 2006, 12:49pm UTC](https://forums.speedlife.net/t/sr20det-running-rich-timing-idle-injector-qs-urgent/97837/1 "2006-07-11T12:49:52Z")
Ive got a s13 redtop (first gen = no heat sinks) in an s14
running stock t25,
stock sidemount,
nismo FPR,
apexi twin chamber bov,
stock elbow,
stock downpipe and cat
and a 3" URAS catback
the car is running very rich and idles high at around 1300… i cannot seem to get it to go lower than that with the idle set properly, when i do the timing has to be all out of wack.
when i adjust the timing to 15, and rev the motor, it stays at 15 and does not move, is that normal?
also im unsure, but i wanted to know if the fuel injectors are continuous or if they are pulsed, and if anything other than just the computer will effect them.
i looked for an idle adjustment on the manifold near the iacv but i was unable to find one.
can anyone help me?
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### Author:  [@steve\_s14](https://forums.speedlife.net/u/steve_s14)
#### Post date: [July 12, 2006, 11:50am UTC](https://forums.speedlife.net/t/sr20det-running-rich-timing-idle-injector-qs-urgent/97837/2 "2006-07-12T11:50:35Z")
the car is still in north carolina, im going by what my dad is telling me
> I unplugged TPS to get out of ecu control
>
> Idle was low, adjusted it up with the set screw on the butterfly assembly( the one that the gas pedal cable attaches to), set it to approx 750RPM ( Note by ear, no instrument-- but remember, your dad has a tuned ear for RPM–it is \*\*\*\*ing close-- I don;t want no shit from the purest gallery)
>
> THen I set the timing, book says 15 deg, +/- 2, so I set it to 16,
>
> life is good so far, reconnect the TPS, and the car instantly jumps to 1400RPM,
>
> I blip the throttle while looking at the timing mark, the timing indexes do not advance, the timing remains at 16degrees, , this I do not understand,
and
> I hope to borrow an oscilloscope to confirm the injectors are pulsed, I’m not up to speed with LED lamps or their trigger speed, but I know how to use a scope, in fact I can set the idle speed with an oscilloscope.
>
> It’s running rich because there is a ton of fluffy black powder on the plugs, the large fluffy carbon appears within 1 minute of inserting new plugs.
> When you blip the motor to 2-3K, clouds of black smoke fumigate my front lawn,
>
> My conclusion is one of two things, either it is getting too much gas, or not enough air.
>
> The motor idles at 1300RPM, it also has an occasional backfire when returning to idle after a good blip.
>
> I unplugged the TPS to set the timing, that seemed to put the car into default ( limp ) mode. set timing to ~16 degrees BTC.
>
> I can confirm there is no vacuum leak, boost gauge registers around 12-14 , don;t know what the relative measure is, foot -pounds or once inches–what ever!!!
>
> I have disconnected a vacuum line and the motor RPM rises about 200-300RPM and runs a tad rougher, put it all back together and it returns to normal.
>
> I have not driven the car under load to see what it will do,
>
> tonight I will readjust the fuel rail pressure since I played with it a bit to see what it would do.
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### Author:  [@Hurricane](https://forums.speedlife.net/u/Hurricane)
#### Post date: [July 12, 2006, 12:28pm UTC](https://forums.speedlife.net/t/sr20det-running-rich-timing-idle-injector-qs-urgent/97837/3 "2006-07-12T12:28:03Z")
Check the TPS voltages. Should be .455 at idle and ~4-5v at WOT
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### Author:  [@pearlS13](https://forums.speedlife.net/u/pearlS13)
#### Post date: [July 12, 2006, 1:15pm UTC](https://forums.speedlife.net/t/sr20det-running-rich-timing-idle-injector-qs-urgent/97837/4 "2006-07-12T13:15:36Z")
as far as the timing goes, when you rev the motor you should see the timing advancing.