injector diffusers cause rough idle ?
#1
imitek
Thread Starter
injector diffusers cause rough idle ?
Running 850s x4 just got it back on road have a larger set of 2200cc bosch but wanted to get it running all good first then i will upgrade injectors
Im currently idling at 1500rpm no
Idle control vale( as no aux output available)
I remebre i use to be able to idle at 1k
I diddnt bother putting in the diffusers
Im just wondering if any one has experiance with the diffusers
Car drives fine its just the idle i want to sort out when i reduce or increase idle ether by screw, timing, or fuel it wants to cut out
Seems fuel related
Im currently idling at 1500rpm no
Idle control vale( as no aux output available)
I remebre i use to be able to idle at 1k
I diddnt bother putting in the diffusers
Im just wondering if any one has experiance with the diffusers
Car drives fine its just the idle i want to sort out when i reduce or increase idle ether by screw, timing, or fuel it wants to cut out
Seems fuel related
#2
Rotary Enthusiast
is your fuel injector atomization line hooked up? It might help a bit if your running both larger injectors & no diffusers
That and stock 850s will never be the best for idle. They are old tech and fairly large. Should still work ok though
That and stock 850s will never be the best for idle. They are old tech and fairly large. Should still work ok though
#5
Most importantly, the grommets need to be installed around the top of the injector hole. The fuel rail should also be milled down, to allow proper seating of the injector. Then the primary injectors should be set at 64.7% in the PFC.
Edit: another problem I see frequently is the black plastic spacer missing, causing the rail to damage the grommets and diffusers.
Edit: another problem I see frequently is the black plastic spacer missing, causing the rail to damage the grommets and diffusers.
Last edited by Banzai-Racing; 08-24-15 at 07:47 AM. Reason: more info
#6
imitek
Thread Starter
I forgot i put this post up it was late night lolol
Thanks for the information
Guys very helpfull as always
The rubber o ring that sits around the injector is on both injectors and the plastic spacer is also in
When i said the diffusers not in the top part is but u no the thin legs that snap that part is not in
Tuning wise its motec m2r ecu ive played with the enrichments anything above 1400rpm is perfect no hesatance or flatspots or anything
No problems croosing only when i drop the idle down on screw
Tell u what it does seem like an air leak the way it hunts
There was one place i was getting an air leak was them primry injector big o rings (brake cleaner spraying around then started choaking)
Took them out and silicone them badboys back in just to test made no diffrence same still runns lumpy when i drop idle down
Ill record it tomaro and upload if it makes it easyer
Thanks for the information
Guys very helpfull as always
The rubber o ring that sits around the injector is on both injectors and the plastic spacer is also in
When i said the diffusers not in the top part is but u no the thin legs that snap that part is not in
Tuning wise its motec m2r ecu ive played with the enrichments anything above 1400rpm is perfect no hesatance or flatspots or anything
No problems croosing only when i drop the idle down on screw
Tell u what it does seem like an air leak the way it hunts
There was one place i was getting an air leak was them primry injector big o rings (brake cleaner spraying around then started choaking)
Took them out and silicone them badboys back in just to test made no diffrence same still runns lumpy when i drop idle down
Ill record it tomaro and upload if it makes it easyer
Last edited by imitek; 08-24-15 at 03:24 PM.
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#9
imitek
Thread Starter
Thanks again ^^^^^^^^^^
You cant realy hear it but you can make out the shaking of engine
https://www.youtube.com/watch?v=xK6l9qphG6w&feature=youtube_gdata_player.
You cant realy hear it but you can make out the shaking of engine
https://www.youtube.com/watch?v=xK6l9qphG6w&feature=youtube_gdata_player.
#10
imitek
Thread Starter
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