Coilpack questions - Toyota Nation Forum : Toyota Car and Truck Forums

camry314 · 09-16-2009, 01:19 PM

I have a 94 1mz-fe and I am stating to have some issues with the coilpacks. I have all individual coilpacks on both banks. I have been wondering if its possible to swap/upgrade to the Gen4 coils that have packs in the front and wires that run to the rear. Any help in this is very much appreciated!

Thanks!

Pic for reference:

chronoti · 09-16-2009, 01:46 PM

no.

well yes.

you need the 95-when ever they wet back to the 6 coil? vvt-i? wring harness and ecu.

camry314 · 09-16-2009, 02:08 PM

Well, damn. I am not really excited about spending around 200 each for new coils.

camry314 · 09-16-2009, 02:28 PM

Ok, I am getting a multiple cylinder misfires from cylinder 1 and 3. Now correct me if I am wrong, but arent cylinder 1 and 3 on the firewall side? When I pulled the codes, I had the multiple misfires, but I also had cylinder 1 and 3 misfires. So would I be looking at coilpacks, or ignition module, or what?

abew330 · 09-16-2009, 08:11 PM

thats all you get is 2 codes for each misfire cyl? anything else?

cyl 1, and 3, are right next to each other on the pass side... have you changed anything? tune up recently?

try swapping coils and see if the code jumps to the cyl you swap out.

maybe dirty connections?.. faulty plugs?.. dirty injector?

there isnt much you can do to upgrade the coils

camry314 · 09-16-2009, 09:20 PM

^^ Yes, those are the only 2 codes I got. I did just replace the rear valve cover gasket. The plugs have about 6K on them, the I didnt touch the injectors, other than unplug the rear 3, but they are all plugged and clipped back on. The only thing that I can think of is the pass side rear and trans side rear coils, I did swap those 2 around. Maybe they dont like the move! I did also get some dielectric grease to put on too. I am just going to give all that a try and see what happens. Sadly its raining like hell here, so that will have to wait a few days. The worse part is that its only intermittent. Its fine when its cold, then its rough up to op-temp, then when its fully warmed up it fine again. It is sort of strange.

chronoti · 09-16-2009, 09:28 PM

1 & 3 sandwich the front knock sensor. the 94 have an overly sensitive sensor you can move the sensor (tony the tiger did) or try a top end induction cleaning (seafoam, bg, or toyota) and resetting the ecu.

***Eye8Pussies*** · 09-16-2009, 11:18 PM

also, there isn't a point in changing to the 96+ coilpacks with the wires to the rear bank since they will actually be a downgrade, as they are wasted spark

abew330 · 09-16-2009, 11:31 PM

i agree with chronoti i would clean up and reset.
the back side of the engine is a b*tch to access..
i had similar problem(s) best way i fixed it was to individually un-plug each coil/injector and re-connect it to see if idle changes at all... then move to the next coil/ injector

i swapped out my old coils and only 2 injectors on the rear side of the engine with no problems (knock on wood)

camry314 · 09-17-2009, 12:29 PM

I have seafoamed twice in the last 8k miles, last time being less than 2k ago. I have thought about moving the knock sensor, but thats below the lower intake manifold, correct? I am thinking about swapping the possible bad packs to the front side of the engine in case they are bad, so they are easy to access. Its just so strange how it just randomly comes and then just stops for awhile, then i come to a stop and its acting up again. Its just odd.

chronoti · 09-17-2009, 12:56 PM

yup the knock sensor is under lower intake.

i would move the bad packs to cylinder to 4 and 6. also check/upgrade your ground lines might help.

camry314 · 09-17-2009, 04:01 PM

I will move the knock sensors at a later date, but for now I think pack swapping will just have to do. Now which are cylinder 4 and 6? Are those the 2 on the front closest to the TB? I thought cylinders 1,2,3 were across the back/firewall side and cylinders 4,5,6 are on the front side/rad side. Is that not true?