Question about 1999 Honda Civic

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How to repair ecu

Car is miss firing

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Hi i would look more into a rebuilt distributor the come complete easy install cap rotor is on ir but first make sure the spark plugs and spark plug wires are good ecu are a very uncommon problem for u r vehicule danny

Posted on May 03, 2014


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1997 jeep wrangler 4cyl not firing all new wires plugs cap a rotor button was running after installed,

ok, why not correct your first post
edit to
1: will not crank starter is silent
2: or cranks fast but will not start.

you cant get to 2 unless #1 works,
check fuses first.
key on CEL glows, if not ECU has no power. 12vdc.
when you crank
the ECU closes the ASD relay
if the relay drops out in the middle of cranking
that means the ECU did that ON PURPOSE
and always tells you why, but that takes a scan too.
why not let your mech do that,
you dont have tools so, its hopeless , for sure.
I bet.

IF the ASD does not drop OUT
then it's what?
total loss of spark (a bad spark coil ?)
or total loss of fuel pressure.

if sparks ok (a simple test done for 100 years)
endless examples, and in all car books.
if sparks ok
then a test fuel test runs engine for 2 sec. about, telling you lost fueling
and then I post a wall of text on fueling (yah complex. and not doing it)

Jan 29, 2017 | Jeep Cars & Trucks

2 Answers

Miss fire on cylinder 4

What car & what engine? Coil pack, coil leads, distributor, send more info on your vehicle

Mar 11, 2015 | Cars & Trucks

1 Answer

Motor is miss firing p3o3 changer ecu after few mins mis fires is my crank position sensor not reading the third cylinder for some reason i did a motor swap ran new motor 3 or 4 hours had miss shift...

your crank position sensor does not read individual cylinders, only the position of the crank shaft. make sure the plugs and wires are good, check the spark coming from the coil, make sure there are no vacuum leaks at intake manifold, check timing, then do a leak down test to make sure you don't have a bent or damaged valve in the cylinder head.

Mar 31, 2011 | Honda Civic Cars & Trucks

2 Answers

Mercedesw202 c200 pms ecu system . car wont start

Hi I have a 1995 C200 Auto Sedan chs WDB 2020202F241703, I think I have a problem in the ECU. Only runs on two cylinders, I have changed the core pack on the 1 & 4 cylinders but the problem persists. The other problem is I don't know where the ECU (engine computer ?) is can anyone help ?

May 17, 2010 | 1995 Mercedes-Benz C-Class

2 Answers

Car will not start.Engine turns over but spark plugs willnot fire

I would say replace ignition coil, that might me the problem, otherwise it can be the ecu, which might have some electrical problems not allowing the car to stay running. Good luck.

Dec 29, 2009 | 1997 Eagle Vision

1 Answer

Miss fire only when cold and under load. no fault codes logged in ecu

On 2.5L and 3.0L X-Types in the vin range C00294 to C91735 there was software issue on the engine ECU which caused misfires/hesitation when cold. this could be repaired by re-configuring the ECU with a software download. There was a Jaguar technical bulletin for this issue, the bulletin number was A303-05.

Oct 19, 2009 | 2002 Jaguar X-Type

1 Answer

Ford fiesta 2002 1.4 diesel lx

sounds more like the ECU

Jul 09, 2008 | 1999 Ford Escort

2 Answers

Engine miss fires

check the mass air flow sensor at the clean air intake!!

Jun 17, 2008 | 1998 Ford Contour

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