Getting 800cc injectors to idle - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-29-2010, 10:13 PM   #1
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Default Getting 800cc injectors to idle

Does any one have any input? I have not had much luck.
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Old 08-30-2010, 12:18 AM   #2
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on pump gas? it should be as easy as setting up dead time corrections properly and doing very minor adjustments to your previous map.

my 1000's were no problem at all on gas.

e85 whole different story though
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Old 08-30-2010, 12:19 AM   #3
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Mine idle. Better than my msm injectors. One thing I did was to leave the master scale factor built in so when make changes you can make small changes easier.

I'm assuming you have the dw injector. The lately curve took me awhile to get units correctly. If I remember correctly you need to add a zero to their table to get the units right.
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Old 08-30-2010, 04:22 AM   #4
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Yes sir, 93 pump gas.

yes the dw800s and yes they are in the 10 range so it says 4.6 on the graph or whatever but its 46 on the adaptronic chart.

You guys got anything i can see and try to go off of?
currently my setup is revved up to 1600 rpm to keep it up, when the fans kick on it goes down to 1k sometimes to 900 for a sec or two then it goes back up to 1600ish. When i first start it up it barely idles so i gotta give it gas until it starts up. This is completely fresh map so i dont have anything setup as far as the idle goes nor do i have an old map for idle as i just got the ecu installed. The rest of the map is good but the crazy idle.
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Old 08-30-2010, 05:50 AM   #5
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What map are you using?

The 600cc base map that's in the package should actually be able to work close enough for you. Hell, I used it to run my 1000's at first and while not great it actually worked decently and the car idled on it.
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Old 08-30-2010, 11:34 AM   #6
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no map bud, just something Travis started from scratch.
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Old 09-01-2010, 02:09 AM   #7
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Alrighty i got a steady idle. 1.1k and it stays steady however its running at 11:1-12:1!!! i've tried adding and removing fuel from the maps, no luck, it appears that some enrichments i dont know about are mixing my idle up. It dies when i lower or lift both windows at the same time, same with the fans. Also once in a while it would start bouncing up and down 2-300rpm out of control and eventually becomes very unstable and dies. Also something else i'm having problems with is engine decelerating is still giving me fuel ratios of 10-12, my 0kpa row is all 0s and still no luck.
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Old 09-01-2010, 02:22 AM   #8
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Sounds like what I went through (minus the electrical). Run it in open loop. I'm still cleaning up my map but I can post where its at if you like. its crazy rich takes awhile to fire but goes down the road well, no boost. I just did my first hand smoothing tonight.
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Old 09-01-2010, 02:33 AM   #9
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i tried open loop here and there but not much luck :( I'll try to go crazy with the leaning out but dont some of the enrichments still stay in tact?

The even crazier thing is when it dies it dies because it leans out (closed loop that is) I crank on it for about 4-5 seconds and it starts and if i dont give her gas right away she dies because shes still leaned out, then after some time it will richen up and idle perfectly normal at 1.1k again.
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Old 09-01-2010, 05:35 PM   #10
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hey what do you know my LC1 sensor just died, any one has any info on how to clean it up or is it toast? Its showing anything from a blinking 7.4 to full lean 21.8. Also i saw some one found a replacement bosch sensor from vw, any more info?
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Old 09-01-2010, 10:27 PM   #11
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When I first started tuning everything was really rich and it covered the o2 in soot. I took it out, cleaned it off by hand and everything seemed to be more predictable. I think y8s had a similar thread somewhere on here about that.
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Old 09-01-2010, 10:41 PM   #12
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well i searched around and found that 03 vw beetles upper sensor works, went to vatozone and bought one. 51 bucks part number 17014 and with 1 year warranty. It sure beats the 75 bucks from innovate, no warranty + shipping cost by a mile.

Oh and for future reference i'll tare it up from the passenger side no the drivers side. My downpipe is leaned towards the passenger side so there is a lot more room to fit the wrench up there. I had to jack it up twice lol.
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Old 09-02-2010, 12:39 AM   #13
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It's an 800cc injector, don't expect to idle it at stoich. If you can get a solid 13:1 idle I'd be very, very pleased with that.

What's the minimum on times on the DW800s? Part of the reason 18psi and I can idle 1000cc injectors so well is the crazy low minimum time of the ID750/1000s.
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Old 09-02-2010, 12:45 AM   #14
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well i dont mind 13 however i do have a problem with 10:1 :P
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Old 09-02-2010, 05:23 PM   #15
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So i screwed around a bit with the settings and the a/fs. Yes for the first time i got a solid 15a/f without it bouncing all over the place. Anyhow my solution to the problem for my bouncy idle was setting the 3 control parameters to 0. They were originally set for 3, 8, and 1. Before it would go to 1k, idle for a sec or two then go crazy and start bouncing. 1k ~11a/f up to 1400rpm 17a/f then back down to 1k then back up to 1.4k...no way of setting a solid a/f level since half the time its off the gas.

will setting those 3 to 0 upset the already set settings or am i currently running the thing in open loop due to them being at 0?
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Old 09-02-2010, 11:01 PM   #16
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Quote:
Originally Posted by Savington View Post
It's an 800cc injector, don't expect to idle it at stoich. If you can get a solid 13:1 idle I'd be very, very pleased with that.

What's the minimum on times on the DW800s? Part of the reason 18psi and I can idle 1000cc injectors so well is the crazy low minimum time of the ID750/1000s.
I can idle at any afr. Right now it idles at 14. I think I have values in the .4 range but I'd have to check since I use the master trim to make adjustments more fine with the keyboard.
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Old 09-03-2010, 12:12 AM   #17
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my idles are at 1.800-1.900

This is pissing me off, earlier i was stuck in traffic and my a/fs went in the toilet. RICH RICH RICH. average of 14 a/f went to 11-12s even under light driving where for sure i'm above 14 normally... i'm currently using the stock push in temp sensor and its mounted in the engine bay, do you think this is the reason for the crazy rich a/fs? It was traffic so yes the car was warmed up, the temp sensor using the F2 gauges was reading 48 degrees C.

Also my idle went back to rich again even after the car is cold, it makes no sense since i did not change anything and the a/fs at idle change to whatever they want to change.
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Old 09-03-2010, 01:27 AM   #18
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Quote:
Originally Posted by triple88a View Post
So i screwed around a bit with the settings and the a/fs. Yes for the first time i got a solid 15a/f without it bouncing all over the place. Anyhow my solution to the problem for my bouncy idle was setting the 3 control parameters to 0. They were originally set for 3, 8, and 1. Before it would go to 1k, idle for a sec or two then go crazy and start bouncing. 1k ~11a/f up to 1400rpm 17a/f then back down to 1k then back up to 1.4k...no way of setting a solid a/f level since half the time its off the gas.

will setting those 3 to 0 upset the already set settings or am i currently running the thing in open loop due to them being at 0?
I'm completely clueless which parameters you're talking about.
My idle is ok, definitely needs more work. I'd love it to be rock solid at anywhere between 12-15 (one can only wish right?).
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Old 09-03-2010, 01:41 AM   #19
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go to corrections tab, then click on set closed loop parameters right under the closed loop mode. the top 3 is what i changed to 0s

Also where did you guys get your air temp sensors that you install into the pipe before the throttle body?
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Old 09-03-2010, 01:43 AM   #20
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diyautotune
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