2JZ-GTE VVTi poor run on cylinder 3

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anzelmi
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Location: Finland

2JZ-GTE VVTi poor run on cylinder 3

Post by anzelmi »

Hi

Car, Toyota Aristo V300 -98, Holset HX40 Super, BC 264 cams, 1200 cc EV14 injector, original coils and MS3Pro + CAN-EGT (EGT sensor per cylinder)

Problem: Cylinder 3 is run poorly and EGT is over 100 celsius colder then other cylinders.
Tested:
- injectors cleaned and tested -> Good
- coil and plug and wires interchanged
- cylinder compression and leakage is tested -> these are good
- movement of the valves tested and also valve clearance check -> OK
- EGT sensors are swapped and new sensor has been tried -> no effect
- original cams also make that same problem

Is it a possible I make some mistake in MS3Pro setting? :oops:
Last edited by anzelmi on Sat Sep 24, 2016 12:23 am, edited 1 time in total.
Toyota Aristo JZS161 -98
MS3Pro 2JZ-GTE VVTi, Holset HX40 Super
Ofgear + heavy duty transmission with high stall converter
Matt Cramer
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Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by Matt Cramer »

We once bought a "low mileage JDM" 2JZ that we later found out it had two flat top pistons and four dished ones.

I'm thinking there is something mechanically wrong with the #3 cylinder. Try a compression check.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
anzelmi
MS/Extra Newbie
Posts: 6
Joined: Tue Jul 19, 2016 12:20 am
Location: Finland

Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by anzelmi »

Here is couple photos Cylinder #3
Image
Original size

Image
Original size
Toyota Aristo JZS161 -98
MS3Pro 2JZ-GTE VVTi, Holset HX40 Super
Ofgear + heavy duty transmission with high stall converter
suberimakuri
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Posts: 632
Joined: Sun May 02, 2004 2:16 pm
Location: Auckland, NZ
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Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by suberimakuri »

Is that the MSQ you have been running?

The VE table has zero resolution. Does it idle?
The input lag values, including MAP are very low.
Injector size is in as 1000 not 1200.

I think you need to fix lags and injector size, then redo the rows in your VE1 fuel table.
Maybe start from 20 or 30 and go up to 100 in increments of 10, then space the rest out to suit your max boost.
slow_hemi6
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Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by slow_hemi6 »

Have you swapped the thrmocouples to see if the problem moves with the thermocouple?
Find the Manuals up top under Quick links: Manuals. :RTFM:
Cheers Luke
anzelmi
MS/Extra Newbie
Posts: 6
Joined: Tue Jul 19, 2016 12:20 am
Location: Finland

Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by anzelmi »

Sorry I share wrong MSQ file. Now is the latest.
Toyota Aristo JZS161 -98
MS3Pro 2JZ-GTE VVTi, Holset HX40 Super
Ofgear + heavy duty transmission with high stall converter
xgrapher
Helpful MS/Extra'er
Posts: 105
Joined: Sun May 16, 2010 5:43 am

Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by xgrapher »

Since you only have problem on cylinder 3 I think you should first try and swap the injectors and coils of that particular cylinder in question with other working ones. Look's like you have already done that. If you hook up a test light on the INJ3 and compare it with let's say INJ1 would you see weaker pulses on INJ3? Finally, you could use the cylinder 3 trim table to up the fuel and see if the egt responds.

I'm positive it's a mechanical issue - if the exhaust valve is stuck close your cyl pressure won't get hurt. Compression test, unfortunately, doesn't help always.
shaodome
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Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by shaodome »

this also has a lot to do with the turbo manifold design. Many times the runners on cyl 3/4 are short and the manifold is NOT equal length. This creates higher back pressure in those runners, which means higher EGTs. See it all the time.
xgrapher
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Re: 2JZ-GTE VVTi poor run on cylinder 3

Post by xgrapher »

shaodome wrote:this also has a lot to do with the turbo manifold design. Many times the runners on cyl 3/4 are short and the manifold is NOT equal length. This creates higher back pressure in those runners, which means higher EGTs. See it all the time.
Problem is only with cylinder # 3 and it's misfiring as stated. Short/long runners causing higher EGTs is irrelevant with this case.
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