Thorb

Hi ... my zx2 gets the code ... saying its misfired in cylinder 1 and nothing else .... this misfire happens when the car is warm and under high torque. its fine under casual driving.
A friend thinks its the wire or coil ... i'm looking for other opinions and would love to find out what resistance the wire should be ... and the coil should be ....
I was thinking its the fuel filter or a partially plugged injector but cleaner has not done much ... though it has seemed to have helped a bit.

i'm also curious as to where the fuel filter is

any help would be appreciated

R.S.LOGAN

I agree with your friends opinion on misfire , very common .Also check plugs . This link with pics should help you with the fuel filter .

Fuel Filter

Thorb

Thanks for the link for the fuel filter info. ... it will come in very handy.

now I just need the resistance numbers to do some testing when the weather gets better ... one thing this problem is doing is keeping me from wasting gas through quick accelleration.

FordMan59

Hope this will help you out.


How to Test Sparkplug Wires | eHow.com

If you own or have access to a Chilton's manual it will give you the resistances for the coil. If you don't have a Chilton's or can't get hold of one let me know and I'll look them up for you and post them or if you'll provide your email I can scan the pages from the Chilton's and send them to you in an email, but the coil's resistances can be OK yet the coil still be bad. I recently had a misfire on #4 cylinder in my '02 Escort SE, the coil's resistances all tested good, but the coil was defective. If the wires are long enough to switch the wires on cylinders 1 & 2 alternate the wires and reset the ECU, if the misfire moves to cylinder #2 you have a bad wire. Same for a plug move the #1 plug to another cylinder reset the ECU and see if the misfire moves to the cylinder with the #1 plug in it. If you have the Chilton's manual it also gives specifications on testing the cam/crank/MAF/TP sensors. If your problem ends up being a coil and you have another car to drive until you can get the parts there are sellers on ebay that sell the coil for about $25. including shipping. The local Advance Auto Parts wanted $70. for a new coil, I ordered one off ebay for $24.49 including shipping.

Here's a link that was provided to me to help with my #4 misfire. All the same should apply to a cylinder #1 misfire.

http://repairpal.com/OBD-II-Code-P0304

Thorb

Thanks ... my wires are cut to fit so not interchangable ... thinking of going to wreckers for some wires and a coil pack ... The prices I'm finding though are much higher than yours. I did swap plus and no change. doesn't happen if I drive gentle ... so for now ... that's what I'm doing. The way it runs , I'm pretty sure everything will test fine when not under load.
At the price of gas and its cost ... I'm thinking these other things don't look so expensive any more and I should go new parts. Maybe even from Ford. .. lol.

FordMan59

IGNITION COIL FORD ESCORT VEHICLES VARIOUS BRAND NEW | eBay

Here's the link to the ignition coil I bought for my '02 Escort.

Thorb

Thanks guys ..... the original probable cause my friend said .... was.
I got some new Champion wires from Parts Source on the way home ... swaped out #1 and it seemed to fix the problem so ... I swaped out all of them and now the car is running dandy again ... 54 dollar fix.
Hopfully the coil will stay good. Next thing I guess is new summer tires.

R.S.LOGAN

Good to hear you've got it fixed , thanks for update .