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1QUICK4
11-04-2008, 10:16 PM
Finished my build the other day and got my timing set today. Timing is on and I put brand new spark plugs in it but it runs like crap. Won't rev up fast, cuts out, doesnt hold idle. No vacuum leaks that I know of either. It ran good sitting there for a while and then I changed the plugs and now it runs like crap, old plugs were black and shot. It seemed like it ran good when I had my s14 hooked up to it to jump it, maybe bad ground but i'm not sure.

Build consisted of apexi head gasket, cams and SC61.

Runing enthalpy tune with z32 maf and 555cc injectors also until I wire in the haltech and add the deutchwerks 810's.
SoguRacing
11-04-2008, 10:26 PM
running rich? is the ecu tuned for the setup?
xyooj180sx
11-05-2008, 01:17 AM
what kind of sparkplugs are you using? i had the same problem after my rebuild when i was running denso iridiums, id tried ngk bkr7e and it ran fine after.
1QUICK4
11-05-2008, 07:32 AM
running rich? is the ecu tuned for the setup?

Ecu is tuned for 555's and z32 maf. It's not driving it that makes it not run good it's just sitting there running.

I run NGK BKR7EIX's for plugs.
HS13KLS
11-05-2008, 07:54 AM
what are your AFR at?
1QUICK4
11-05-2008, 07:57 AM
what are your AFR at?

Not sure, the cas was off by a tooth and I restabbed it and now the timing is on and I pulled my plugs and htey were black, so I put new ones in after I got it timed right.

I have a few things left to do, get my top mount turbo extension modified so it will fit my down pipe, weld in a new o2 bung for wideband (that's why i don't know what my afr's are), I have to route my blow by stuff and extend my brake booster line. The port on the manifold for the brake booster line is plugged though.
HS13KLS
11-05-2008, 08:55 AM
hmmm..

well if your car is running crazy rich id put money that you are having a spark issue

my car did that(i have a KA) and i was running somewhere in the 6-9 afr.

and my car barley wanted to drive.

and the rotor under my dizzy cap was toast.
replaced it. and my car drove beautifuly

but now my car is shitty, but i ordered a new ignition coil. ill see if that fixes it

check the ohms on your ignitor.. it may be going out.
1QUICK4
11-06-2008, 08:52 AM
Well it starts up good after it has been sitting for awhile so I imagine it is running rich. Now I just gotta find out why
s13dan
11-06-2008, 05:06 PM
IF yo have REALLY cold plugs they can make a car idle as if it had cams... but drive fine. kinda like my car...
1QUICK4
11-09-2008, 09:44 PM
IF yo have REALLY cold plugs they can make a car idle as if it had cams... but drive fine. kinda like my car...

Well I have cams and it doesn't drive fine. I really need to get this figured out.

And my vacuum is at -11,-12. don't know if that's from a leak or it just not running good.
1QUICK4
11-13-2008, 04:58 PM
So after I let it sit for a week or so and let it think about what it did it started right up, idles low at like 600 and won't rev past 1k.

Anyone seriously wanna shed some light on this? I need all the help I can get
Sileighty_85
11-13-2008, 05:09 PM
bad injector o-rings, Vacuum leak, Make sure ECU is gounded, I had a similar problem, ECU came loose from the mounting point and ran really rich, replaced plugs and mounted the ECU back up and ran great again.
1QUICK4
11-13-2008, 05:11 PM
it is running really rich actually, i'm pretty sure because i'm running an open down pipe until it runs so I can drive it to an exhaust shop to have it re-welded so it fits.

not sure if that helps but I will run outside and check the ecu
1QUICK4
11-13-2008, 05:44 PM
ECU is fine, it's mounted.

I noticed the injector seals, two of them weren't sitting down all the way, they were like half way in. So I pulled my fuel rail, looked at them, they looked fine, put them back in and they are all seated now but it still runs the same.
Howard92884
11-13-2008, 06:09 PM
What kind of fuel pump and FPR do you have? Stock?
1QUICK4
11-13-2008, 06:12 PM
What kind of fuel pump and FPR do you have? Stock?

stock fpr, walbro 255. car used to have a 2860rs, I upgraded to apexi metal head gasket, 264 cams and sc61 turbo. car didn't run very good, I timed the cas and it ran good for well over an hour. I took it for a spin around the block and it did not run very good, came back, pulled plugs, saw they were black, put new ones in and it hasn't ran good since then.
Howard92884
11-13-2008, 06:16 PM
Well when I did my first SR swap I put in a Walbro 255 without an adjustable FPR, and when I drove it it wouldn't rev past 2500. Felt like it hit a brick wall, I bought an adjustable FPR and ran like a top after that.
!Zar!
11-13-2008, 07:31 PM
If the problem happened immediately after spark plug install, have you tried putting the old ones back in?

Did you gap them all the same?
1QUICK4
11-13-2008, 07:34 PM
If the problem happened immediately after spark plug install, have you tried putting the old ones back in?

Did you gap them all the same?

well it had started running bad before I put the new plugs in also, barely wanted to drive and when I made it back to the house it did not want to run at all. that is when I changed the plugs. but yes they are all gapped the same.
!Zar!
11-13-2008, 08:19 PM
Check your maf.

I'm on my phone, so I'm not sure if you have/haven't. Didn't read everything.

First start it with the maf plugged in.

Then unplug it.

THEN try another maf.
1QUICK4
11-13-2008, 08:20 PM
Check your maf.

I'm on my phone, so I'm not sure if you have/haven't. Didn't read everything.

First start it with the maf plugged in.

Then unplug it.

THEN try another maf.

Tried that, no change. It was suggested to me earlier on aim.
1QUICK4
11-13-2008, 09:43 PM
pulled ecu codes tonight, got nothing, no codes
!Zar!
11-13-2008, 10:41 PM
Is it SR? Check your coilpack plugs. Mine was coming loose and started to stumble and run like shit until I figured that out.

If not a loose coilpack plug, maybe the cp harness or the cp themselves?

Try unplugging on while the car is running and see if there is any change in how the car runs. If there isn't a change for any particular cylinder then it is something wrong with the fuel or spark for that cylinder...

KA - cap/rotor? But try the unplugging while the car is running thing.
1QUICK4
11-14-2008, 07:26 AM
It's an SR, and I did check the plugs on the coil packs last night.

But this weekend I'll do a full leak test, instead of just a visual check of everything. Change out my injector seals and check all the coil packs, harnesses, and all that fun stuff. Haven't been able to do much lately due to it being freezing cold up here and snow everywhere.
!Zar!
11-14-2008, 09:30 AM
Well you can still unplug each plug off the coilpack while the car is running.

Do one at a time and see if there is a performance change during idle.

It only takes like a minute.
1QUICK4
11-14-2008, 10:02 AM
Well you can still unplug each plug off the coilpack while the car is running.

Do one at a time and see if there is a performance change during idle.

It only takes like a minute.

At work now, will hopefully try it this weekend, providing the weather is nice enough for me to put it on the trailer and haul it to the shop so I can work on it all weekend and not freeze.