1JZ problems

[urantia]

shit that isn't bad, let me know if he comes thru with the goods at that price

i'm after a set aswell.

[cressida_1jz]

Toyota said $120 each incl GST.I thought they would be more than that.

I sugested Bosch coil packs and he said there a heap of garbage compared to the Denso ones.

And they just slot strait in.

They dont come with the blue rubber boot.

[cressida_1jz]

double posted.Sorry

[TTMX83]

Great news for you. I think my problem goes a bit deeper than that. I paid $140 for a coil from Toyota, with the boot. Retail was a bit over $160. I will try my car without the O2 sensor anyway, it always runs rich too. Keep us informed on the progress.

Brad.

[YelloRolla]

Remember when changing coils to clean the spark plugs before trying it out. I just give the plugs a squirt of carby cleaner.

I have had the problem before (not a 1JZ) where the coils were frigged, when I replaced them the problem remained UNTIL I changed the plugs. I reason that the plugs were fouled from insufficient spark and a nice rich mixture of Optimax.

[TTMX83]

YelloRolla - Thanks for that. I put new plugs in at the same time.

But I have found the (well, a problem.) The injectors are leaking, They don't hold pressure and the engine is struggling to idle due to the amount of fuel getting pumped into it. Now I need to take them out to test them but I'm not convinced that is the only problem.

I found a couple of leaky capacitors in the ECU that I will change out when I can get the right value. All of the loom checks out OK so far.

ALL my coils have cracks in them too. For now I have just taped them up with insulation tape till new ones get here. There was one that had a jumping spark but I replaced it with a brand new one. The others weren't jumping but I taped them anyway.

No problem as I won't be driving it at all and it's been like this since Christmas. I'm getting withdrawals...

Cheers Brad.

[cressida_1jz]

I drove the car home today(30km)from work and it was running beautiful.

AFR guage is working good now.

I have a gut feeling still that it hasnt fixed the problem after trying so many things

Il see how it goes tomorrow.

Would u think a o2 sensor would do this?

[TTMX83]

Just see how it goes I guess. Mine isn't driveable at all now.... Working on another car to use as a daily driver now, so the Cressida get the back seat for a few days.

Cheers Brad.

[cressida_1jz]

It played up again this morning.

Pulled out the ECU and gave it to the wiring guy to sus out.

3 caps were leaking and 1 of them was coroded from the fluid in it.

Getting it repaired for $20 of him.

Im 80% sure thats my problem.

Il see how i go.

[TTMX83]

Awesome news. I had two leaking ones but I could only get four of the five in there, I'm replacing them all After I change them all, I will report back.

Cheers Brad.

[urantia]

Fancy that! the chances of you both having a ECU's with leaky caps. And i always thought the ECU was the last thing to go wrong!

[1JZ.747]

02 sensor dont worry about it


i and joey didnt run o2 sensors on ours once we got twin pipes made up. the cars used a little more fuel than before but no that much that you really noticed it.

[TTMX83]

Well it seems my car is stuffed. I got another ECU to try and it made no difference. Got a set of injectors (Whole rail and FPR) last night to try. Working out the best way to do it today.

[urantia]

keep us updated, i'm curious to know how it goes after trying another set of injectors/fuel rail and pressure regualtor.

[TTMX83]

Well, the injectors all read 14ohm, they all click when supplied 12V. The seals are all buggered Off to get seals.

How do I get to the rear 3 injectors without taking the manifold off? It looks like a pleasant job

Cheers Brad.