engine goes from rich to lean when elecrical load is applied

s300 and SManager software questions & answers
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Spunkster
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Re: engine goes from rich to lean when elecrical load is app

Post by Spunkster » Mon Nov 12, 2012 12:43 pm

Hondata wrote:It is hard to tell without a datalog, but using the ID supplied dead times are not correct and don't work very well. You need values much higher than what they supply - ballpark should be 1.25 ms @ 14V and 1.55 ms @ 12V.

However, you need to measure the voltage at the injectors and see how much is changes when the fans/headlights come on. If it is more than about 0.3V, then something is wrong (alternator, fuse, poor connection etc).

Alessio
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Re: engine goes from rich to lean when elecrical load is app

Post by Alessio » Mon Nov 12, 2012 12:54 pm

mhm

I'll try and measure the voltage together and try the new dead times as they really are much more than those stated by ID.

Thanks

Alessio
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Re: engine goes from rich to lean when elecrical load is app

Post by Alessio » Tue Nov 13, 2012 12:55 am

I tried the new dead times, started the engine, fiddled a little bit to get it to idle stable and afr set to 13.0-13.01. I turn on the headlamps and afr goes to lean, engine stalls and turns off. :(

and I also forgot to take a datalog.

here is the calibration I used, which I got from here.
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test 13.skl
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Rosky
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Re: engine goes from rich to lean when elecrical load is app

Post by Rosky » Tue Feb 05, 2013 8:50 pm

My car does the exact same thing.. for 2 years <_< I have not been able to figure it out. it didn't start until I installed boost by gear, and Im not sure how that would cause it though and I don't think its the problem.

Basically on cold start car runs fine, while cold if I put an electrical load on it my afr changes slightly to learner and the warmer the car gets learner it gets and if the fans turn on the car cuts off.

I've tried everything except tweaking with hondata. anyone have a REAL fix for this?

car is an 88 crx motor is B18A1 LS turbo
injectors - ID1000cc
Previously had Precision 1000cc

Alessio
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Re: engine goes from rich to lean when elecrical load is app

Post by Alessio » Wed Feb 06, 2013 6:04 am

For me in the end it turned out to be a bad ecu, I've changed the ecu, plugged in the s300 and problem was solved. but reading you post it seems you have bad injector dead times.

Rosky
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Re: engine goes from rich to lean when elecrical load is app

Post by Rosky » Wed Feb 06, 2013 2:41 pm

I adjusted the dead times exactly to what it says on injector dynamics website with no luck and ive tried putting new injector size to 895cc instead of 1000cc with no luck =\ I've tried everything I can think of... heres a copy of my tune without me setting the dead times and changing injector size.

car is undrivable unless I wire my fan up to an switch, otherwise when it gets to temp its suppose to come on the car shuts off and even then with the switch wired, once it reaches the fan temp it will lean all the way out and eventually shut off with an electrical load.. even if i press the breaks it will go crazy.
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Alessio
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Re: engine goes from rich to lean when elecrical load is app

Post by Alessio » Thu Feb 07, 2013 1:58 am

what engine are running? setup?

Rosky
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Re: engine goes from rich to lean when elecrical load is app

Post by Rosky » Thu Feb 07, 2013 8:56 am

car is 88crx hf, engine is 93 B18A1, LS head, sleeved block, eagle rods, wiseco piston, LS crank, ported polished+3 angle valve job, ferrera valves, dual springs and retainers, cometic head gasket
turbo setup is GT35r, full race exhaust mani, victor x intake, skunk2 TB, Rywire harness

Rosky
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Re: engine goes from rich to lean when elecrical load is app

Post by Rosky » Sat Feb 09, 2013 9:31 pm

fixed it.

crucian
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Location: Lowville, NY

Re: engine goes from rich to lean when elecrical load is app

Post by crucian » Tue Feb 12, 2013 6:50 pm

Rosky wrote:fixed it.
What did you do to fix it?

Crxracer2
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Joined: Fri Oct 25, 2013 9:59 pm

Re: engine goes from rich to lean when elecrical load is app

Post by Crxracer2 » Fri Oct 25, 2013 10:02 pm

I have a friend with a similar problem, I too would like to know what you did to solve the problem.

sugarbear7979
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Re: engine goes from rich to lean when elecrical load is app

Post by sugarbear7979 » Sun Mar 09, 2014 10:05 pm

Anyone ever figure out what this problem was?

MadVTI
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Joined: Wed Nov 12, 2014 3:30 pm

Re: engine goes from rich to lean when elecrical load is app

Post by MadVTI » Wed Nov 12, 2014 11:10 pm

Same issue here, help lol

Efreng35
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Joined: Fri May 25, 2018 8:52 pm

Re: engine goes from rich to lean when elecrical load is applied

Post by Efreng35 » Tue Dec 11, 2018 10:27 pm

Anyone ever figure this out I’m having exact same issue

MadVTI
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Joined: Wed Nov 12, 2014 3:30 pm

Re: engine goes from rich to lean when elecrical load is applied

Post by MadVTI » Wed Aug 07, 2019 3:58 pm

Still seeing numerous infected with this issue. What's the fix guys?

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