Civiclx

whats up guys, my car will misfire after being pushed hard. I have replaced the cap and rotor of the distributor and fuel filter. The fuel pressure is 35psi when i first start the car. it is a 1997 dx civic with a 19t greddy kit boosting only 7psion a 12:! fmu and missing link, any ideas? The car will only misfire like the second or third time after turning it off from when it was pushed to redline through 3 gears


Modified by Civiclx at 1:29 PM 8/31/2004

tegedrex

What plugs you running and at what gap?

Civiclx

bcpr7es at a .030 gap (NGK)

Civiclx

also, it only started misfiring after one of the injector wires came loose (the red wire - second injector wire) and possibly could have grounded out somewhere) do you think it coule be a faulty wiring harness or possibly a messed up ecu?

Civiclx

cmon anyone? should i replace the ecu and the wiring harness?

Civiclx

help

Civiclx

absolutely anyone

beepy

I had a similar thing happen. I had lost one of the retaining clips for an injector pigtail and it kept rattling loose at high RPMs.

Civiclx

hrmmmm did it come lose at high rpms, or after the car was turned off after running high rpms

david_rg79

seriously sounds like plugs...try new ones and a step colder along with bringing the gap gap down a bit also (.024-.026)

Civiclx

some are saying step colder some are saying step hotter, im running the colder than stock plugs (bcpr7es) right now, any other hints?

Civiclx

ok this is getting ridiculous, on my way to school i didnt take it past 4k rpm, just kept it at 3k going 70 and it started to misfire at about the 20th mile at 3k, it misfired for about 1 minute going uphill then stopped. Everytime i have autozone check the code it is a misfire on cylinder 2 (the cylinder that had the messed up soldering) do you think teh soldering coming loose could have messed up my ecu?

Civiclx

top please

Civiclx

oh btw i kept it out of boost also

-Trinitron-

if you have had problems with that particular cylinder's wiring, I'm wondering if it was repaired properly...it seems a bit of a coincedence.

Civiclx

checked the wiring, but ill recheck again to be sure, the wiring is pretty tight on there (stretch to get the connector to the injector)

Civiclx

not giving up

Civiclx

cmon

USDM 4G VTEC

IMO
the msising link isnt working and ur ecu is seeing some boost
causing it to jump on limp mode

i have boosted more than 11 psi sometimes and the VAFC hack doesnt take enough away and have cause me to limp without a CEL... and with turning engine on off a few times takes care of it

Civiclx

hrmm well the missing link was fine and it has only missed since i found the messed up wire on cyl 2, any way the ecu is bad?

Civiclx

grrr it misfired for about 5 minutes on the highway, stopped for 5 minutes, then did it again

Mr T

I would try and replace the injector plug and extend the wires so they are not so tight ..... you might have a wire broken inside the insulation that you can not see .

Civiclx

im buying a whole new harness for 30 bucks, lets see if thats the culprit, i checked the codes at autozone and it was a misfire on 2 and 4

eg6T

yea man i am having the same problem...my car will run fine,but if i push it,it starts to misfire,but if i turn the car off then back on right away,it works fine again, weird ****..im tryin to figure this **** out too,if i do ill let you know,please let me know if you figure it out

EE_Chris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civiclx &raquo;</TD></TR><TR><TD CLASS="quote">checked the wiring, but ill recheck again to be sure, the wiring is pretty tight on there (stretch to get the connector to the injector)</TD></TR></TABLE>

There should always be some slack in any piece of wire - hopefully the new harnes solves your problems.