no spark 1998 mustang - Ford Mustang Forum
 
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post #1 of 8 (permalink) Old 10-17-2010 Thread Starter
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no spark 1998 mustang

have 1998 mustang with spark problem 2 cilinders do not fire. checked coil also not firing on 2 cilinders. borroved my friends coil and got the same thing but they both work on his car. Question is where is the spark regulater or whatever it is called and how do i check it? my friend said there is a spark regulater or something on the firewall but he isen't sure.:?:

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post #2 of 8 (permalink) Old 10-17-2010
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First I would check the wiring to the coil pack and see if its faulty.

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post #3 of 8 (permalink) Old 10-17-2010
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Which cylinders are not firing?

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post #4 of 8 (permalink) Old 12-10-2010 Thread Starter
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98 mustang

Sorry it took so long to get back to you on the spark problem it is # 2 & 6 cylinders two center coils on the coil pack 3.8 v6 wires ok also. cam position sensor is ok also. I don't know how to test the the ignition control module although i did find it inside the fender and fender wall. In guess i will try to test the brain next do you know how to do that?

Thanks for your info on that hi output fuel pump for my 98 is the only year you have to make som adjustments to get it to fit. Allis well with that now Thanks
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post #5 of 8 (permalink) Old 12-10-2010
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V6 cylinders 2/6 do share a coil pack section. Since the coil pack is good, we should focus on the things that could affect 2 and 6.

Double check the spark plug wires and plugs. Many ppl do not realize that a grounded plug or plug wire will also affect it's twin.

Next check the low voltage coil pack connector. Is it clean and corrosion free? Pay special attention to the T/LG wire.

Next get a set of "noid" style test lights. They can be rented from your local autoparts store. Use the noid tester to confirm if there is a firing pulse coming from the PCM on the T/LG wire. If no pulse, then there is a wiring harness problem from the coil pack to the PCM or the coil driver in the PCM is bad.

Recommend performing a visual inspection of the PCM itself. Often a blown coil dirver is obvious. This will also offer a change to inspect the PCM electrical connector.

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post #6 of 8 (permalink) Old 12-12-2010 Thread Starter
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98 cyl 2&6

Thanks forallthe info will go buy new plugs and wires first have 90 thousand miles on car everything but tires original any uggestion on plug and wire type or brand?
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post #7 of 8 (permalink) Old 12-12-2010
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be sure to follow wmburns' advice on checking the connector to the coil pack and the wiring harness to the pcm

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Windstar Upper Intake with cool-air intake, MAC LT headers, BBK O/R H-pipe, and flow 40s, SCT tuner, FRPP Alum. D/S, 3.73 gears, Auburn HP limited slip, and Team Z LCAs, Eibach sway bars.
Best 1/4 time: 15.036 @90.92mph, 2.148 60'
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post #8 of 8 (permalink) Old 12-13-2010
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Quote:
Originally Posted by biscuited View Post
Thanks forallthe info will go buy new plugs and wires first have 90 thousand miles on car everything but tires original any uggestion on plug and wire type or brand?
"upgrade" plugs won't get you anything (trust me, I bought into the hype when I was first modding and get Bosch Platinum +4 (4 tips)... they did nothing! ) Just get a reliable brand (NGK, Autolite, Champion) and make sure they are gapped properly for your car (.054"). Copper plugs are for racing (change often), platinum will be good for a daily driver (change every 30k miles), iridiums last the longest (close to 60k miles).

As far as wires, anything 8-8.5mm diameter will work: just stick with stock replacement. You could upgrade, but I'm not sure what that will get you (if anything). Others: please chime in!

FLASH = 98 V6, chrome yellow, black & blue accents, 146k daily driver
POWER: divorced exhaust with glasspacks; BBK CAI, TB, UDPs; (shift kit in the garage)
STYLE: black headlights, black taillights, black grille, black hood pins, black window tint, blue hood & side scoops, blue billet fuel door, interior billet, 12000k HIDs
RIMS: XXR 006 black spoke with blue lip; 18x8.5 front, 18x9.5 rear
TIRES: BFG KDW/2 245/40R18 front, 275/35R18 rear
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