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Discussion Starter #1
i'v been posting quite a bit recetly as my car has 90k miles and i am finally making some long overdue repai and upgrades.
In ny case-when startng the car it sometimes taks a few seconds to turn over-is this the ault of my coil packs or plugs or both- i'v been using ngk 1095 - on astock setup for the last 8k miles- this is too long for these plugs huh.

ere are my questions regarding coil packs:

cost for a pair?
part number?
difficult to install?
noticeble difference with a new pairif the old pair has 90k?

thanks all

DC
 

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$350 for a set of 6 packs (3 paired) from Jay Marks Toyota. Call Jeff Watson - he'll tell you that coils do not last forever. My friend Matt was having similar symptoms. The most frustrating one was feeling it missing at higher RPM's. New coil packs absolutely fixed his problems.

John
www.utahracing.com/supras/john.html
 

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If you are having missing problems at hight boost replace the coil packs. It worked for me.....

Matthew
 
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Discussion Starter #4
fuckers- so your saying to replace the coilpacks it cost $350 in parts - fuckin a- this car is getting expensive- i just dropped $2500 on tires and springs and shocks and strut towers(front rear) tranny fluid, differential fluid, new spark plugs-and soon i have to do brakes and clutch-another $2100 - son of a fucking bitch-this is the worst fucking money suck ever-you know i should have just bough a 97 for 7 k more had a higher resale and not have to replace my parts..


does toyota have a time frame or mileage frame in which they suggest these coilpacks be changed?
 
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um... that's part of having this kind of car. If it's too expensive for you sell it and get a DSM or something cheaper to maintain...
 

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At stock boost, or close to stock boost, the coil packs will last a long time. However if you up the boost as the coil packs get old they may start to missfire at high RPM and high boost. I haven't had to replace the coil packs on any of my car even running high boost, and that includes my current car with HKS twins.

Now your problem is not necessarly the coilpacks. Have you replaced the fuel filter? A clogged fuel filter will cause the problem you speak of as it takes longer for the fuel pressure to build.

supraboytt said:
fuckers- so your saying to replace the coilpacks it cost $350 in parts - fuckin a- this car is getting expensive- i just dropped $2500 on tires and springs and shocks and strut towers(front rear) tranny fluid, differential fluid, new spark plugs-and soon i have to do brakes and clutch-another $2100 - son of a fucking bitch-this is the worst fucking money suck ever-you know i should have just bough a 97 for 7 k more had a higher resale and not have to replace my parts..


does toyota have a time frame or mileage frame in which they suggest these coilpacks be changed?
 

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T66Dawg said:
At stock boost, or close to stock boost, the coil packs will last a long time. However if you up the boost as the coil packs get old they may start to missfire at high RPM and high boost. I haven't had to replace the coil packs on any of my car even running high boost, and that includes my current car with HKS twins.
Guilly_

What are you gapping the plugs at on your cars?

stephen
 

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On my car the gap is pretty tight, ~.28. It holds up fine at 30+ PSI.

By the way, one of the reasons many people have problems is because they are using colder than stock plugs. The stock plugs are already pretty cold (A guy that was at Vegas 99 that works for Bosch was surprised at the stock plugs on the Supra because they were so cold), running a colder plug makes it so that the plugs foul easily. I run stock heat range $.99 Autolite plugs on my car with no problems, when I ran some colder NGK's on my T66 car they started having problems after a short while.

element217 said:


Guilly_

What are you gapping the plugs at on your cars?

stephen
 
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Discussion Starter #9
i am currently running ngk 1095's with a gap of either .32 or .34-they felt great for about 1000 miles and since have felt like shit. what is the replacement cost of a fuel filter?- I'm getting stock plugs on friday-what should i have these gapped at?

DC
 

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If you are at BPU or so your gap should be good enough.

Also don't get "stock" plugs, by this I mean platinum plugs, they don'y have as strong a spark as regular or copper plugs.

A fuel filter will cost you ~$20, can't remember how much I paid last time.

supraboytt said:
i am currently running ngk 1095's with a gap of either .32 or .34-they felt great for about 1000 miles and since have felt like shit. what is the replacement cost of a fuel filter?- I'm getting stock plugs on friday-what should i have these gapped at?

DC
 

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I hope that the last post was not directed at me. I will assume it wasn’t. If you piss people off they won't help you. (You were asking for help weren’t you??)

Prior to replacing my coil packs, I replaced my spark plugs with stock and NGK’s both types. I went from .034 all the way down to .029 gap. I even replaced my fuel filter, but this didn’t solve the problem with missing at high boost. The coil packs did.
Yes, these cars can be expensive. I have 100,000 miles on it now I got it with 92,000. I have spent the same on my car plus I just changed my timing belt.
I dont even want to think how much I have spent on Mods. I’m car poor and in debt.
If I wanted a cheap car, I would have bought a ford escort!!

I’m currently running autolight spark plugs at the stock gap and they work great. You can pick them up at Auto Zone. They are also allot cheaper then the Toyota or NGK.
 
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the "fuckers" comment was not directed at anyone - just something i say when i am mad. and yes i understand this car can be expensive- i wouldn't have bought it if i didn't know i could afford the repairs-that being said - it doesn't mean i'm going to be apathetic towards the ridiculous cost of parts.

I am running a stock setup-I've already purchased the plugs -
speed is important but smoothness is too-and i really don't have the energy to change my plugs every 5k miles
 

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dsf

im sure theres a way you can test your coil packs..try decreasing your gap a little too
 
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At the risk of sounding stupid ;) what does a miss feel like on these cars? Are there symptoms, rpm jump, boost fluctuating, egt dropping? the reason I ask is I have a noise at high boost the sounds like a boost leak fluttering, and I am trying to rule out a miss, my plugs are down to .028. Just to be safe
 

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Hey Pete, that sounds like the same type of problem my car is having and I have tried almost everything to fix this, cause I have been told that it is either a boost leak or a boost/fuel cut problem, but I have since ruled out either possibility. After reading this post I think I might try regapping my plugs.

I hope someone can explain what exactly a "miss" feels like. My car is basically bpu with stock plugs (3K miles old) at stock gap and now at around 10-11psi my car seems to be hesitating and making a fluttering noise coming from the exhaust. HELP!!!!
 
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Discussion Starter #17
Get the NGKs they come already gapped down and work great, I loved them at bpu. :)
 

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Its like your car is stuttering. As your accelerating the car will sound something like this vrrrrrrrrrrrrrrKrrrrrrrKKrrrrrKrrrrrrrrrrrr. I only had this problem at high RPM and High Boost.
 

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hlaksdfj

I know that once you are boosting higher than say 14 lbs and your plugs are gapped too high it will cut out on top end cause the spark cant jump that far when theres that much pressure in the cylinder..not sure what the symptoms would be if it was gapped to close
 
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