Service Engine Light.......Replace Ignition Coils

MSC43 · 11-09-2020, 08:01 AM

My service engine light came on. Have 100,000 miles.......I went to AutoZone and these things are $115 a piece....If I take it to the dealer will they determine which one is bad? I could replace all 6. Looks like you have to remove a few things to even get to them and that would be almost $700 in parts. Ugh.

SouthArk370Z · 11-09-2020, 12:30 PM

Given that you have some DTCs related to MAF, I'd try cleaning the MAFs first. Easy job, even for the inexperienced mechanic.

wanker · 11-09-2020, 12:57 PM

Quote:

Originally Posted by SouthArk370Z

Given that you have some DTCs related to MAF, I'd try cleaning the MAFs first. Easy job, even for the inexperienced mechanic.

Agreed. Ignition coils do not all fail at once. When a coil fails, you will get a misfire in a specific cylinder.

It sounds like the MAF or the O2 sensors.

MSC43 · 11-09-2020, 03:04 PM

Quote:

Originally Posted by SouthArk370Z

Given that you have some DTCs related to MAF, I'd try cleaning the MAFs first. Easy job, even for the inexperienced mechanic.

Thanks...what do I need to clean it with? If that does not work it's probably one of the sensors? I just replaced my overhead cam sensors a few months ago......before that the crankshaft position sensors.....damn sensors.

wanker · 11-09-2020, 03:32 PM

Quote:

Originally Posted by MSC43

Thanks...what do I need to clean it with? If that does not work it's probably one of the sensors? I just replaced my overhead cam sensors a few months ago......before that the crankshaft position sensors.....damn sensors.

MAF sensor cleaner is sold in a spray can.

JARblue · 11-09-2020, 05:37 PM

CRC MAF Cleaner is pretty universal. Any brand should be fine though. Wouldn't hurt to also grab some Throttle Body cleaner while you're at it

SouthArk370Z · 11-10-2020, 10:16 AM

Quote:

Originally Posted by MSC43

Thanks...what do I need to clean it with? If that does not work it's probably one of the sensors? I just replaced my overhead cam sensors a few months ago......before that the crankshaft position sensors.....damn sensors.

All you need is a screwdriver (or nut driver) and some MAF cleaner. With car off, unplug one of the MAFs, remove the two screws holding it in, remove MAF, spray with cleaner, let dry, replace MAF, and replace screws*. Repeat on the other side.

As per wanker and JARblue, the cleaner comes in a spray can. I like the CRC brand, also.

*Edit: Forgot to mention plugging the MAF back in. But if you need to be told that, maybe you shouldn't be working on cars.

abm89 · 11-10-2020, 11:45 AM

I just cleaned the MAFs on my friend's Z a couple of weekends ago. He said his car runs WAYYYY better now.

BettyZ · 11-10-2020, 09:59 PM

I clean the MAFs and throttle bodies every 10k miles. Take care of your equipment and it will take care of you.

Sent from my SM-G955U using Tapatalk

MSC43 · 11-11-2020, 07:35 PM

Cleaned the the throttle bodies and MAF's and it's good now. ��....Thanks everyone for the advice.

INFmstrTech · 11-12-2020, 08:13 AM

Quote:

Originally Posted by wanker

Agreed. Ignition coils do not all fail at once. When a coil fails, you will get a misfire in a specific cylinder.

It sounds like the MAF or the O2 sensors.

Now that’s just not true *cough* old FX35’s.

11-09-2020, 12:30 PM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Given that you have some DTCs related to MAF, I'd try cleaning the MAFs first. Easy job, even for the inexperienced mechanic. BettyZ likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

11-09-2020, 05:37 PM	#6 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	CRC MAF Cleaner is pretty universal. Any brand should be fine though. Wouldn't hurt to also grab some Throttle Body cleaner while you're at it abm89 and Corsairprime like this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

11-10-2020, 11:45 AM	#8 (permalink)
abm89 A True Z Fanatic Join Date: Feb 2013 Location: Austin, Texas Posts: 1,383 Drives: 11 370Z \| 24 EL450 Rep Power: 64763	I just cleaned the MAFs on my friend's Z a couple of weekends ago. He said his car runs WAYYYY better now. JARblue and BettyZ like this. __________________ Complete Parts List: https://github.com/abm89/ztouge-build

11-10-2020, 09:59 PM	#9 (permalink)
BettyZ A True Z Fanatic Join Date: Aug 2018 Location: Chicagoland Age: 37 Posts: 5,261 Drives: A Garage Queen Rep Power: 2684371	I clean the MAFs and throttle bodies every 10k miles. Take care of your equipment and it will take care of you. Sent from my SM-G955U using Tapatalk JARblue likes this. __________________ '14 MB Nismo \| Boost Lab 6870 1.32 AR 553 HP / 471 ft.-lbs. Betty Mods

11-11-2020, 07:35 PM	#10 (permalink)
MSC43 Base Member Join Date: Jul 2015 Location: Georgia Posts: 55 Drives: ....... Rep Power: 10	Cleaned the the throttle bodies and MAF's and it's good now. ��....Thanks everyone for the advice. JARblue likes this.

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