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Topics - henry510

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Gen 2 Montero / Cracked Exhaust Manifold (Left)- Headers?
« on: July 12, 2018, 06:42:42 AM »
Hi All,

I've unfortunately discovered a small crack in the driver side exhaust manifold of my 97 SR 3.5L (245K). I thought it was just a bad gasket but alas- it is not so. It's small enough that the noise goes away once the car is warm.

I've got a new OEM on order but started to wonder, are there any options folks know of for improvement- eg headers?

It's a super pain to get at all this- but if I'm going to go there and can improve performance a bit...

Thanks for any insight or advice.

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Gen 2 Montero / What to do about an alignment that won't hold?
« on: July 06, 2018, 09:53:43 AM »
Just checking to see if anyone has experience or advice on front alignment that won't hold (usually toe in) for more than 3k- and it isn't due to getting big air or big bumps offroad! I just installed 5 new KO2's and want to protect the investment.

It's a 97 Montero SR with 244K.

I've just replaced all bearings, sway bar end links front and rear (Moog), sway bar bushings front and rear (Moog), all four shocks with 5100 Bils, upper and lower control arm bushings with siberian and new OEM ball joints- both because it's time and to see if that will help.

Outer tie rod ends still seem solid- and were replaced with OEM ~30K ago.

Next up are new torsion rods and trailing arm bushings and an adjustable panhard.

I can't think of anything else but any advice would be appreciated. Again brand new tires all around so don't want to trash them!

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1997 SR- After fully rebuilding the tranny (don't ask me why) the car starting throwing intermittent p1750 errors (which points to solenoid trouble). After several attempts to remedy- including switching out the valve body, solenoid packs, replacing TCU and ECU they gave up and refunded me. I've attached the part list from their paperwork.

The transmission wires are all ohming ok, wiring harness is clean and harness pin tensions are confirmed good.

The car drives perfect, no slips or shift symptoms. After reseting the p1750 error it can take a few hundred miles to return. The TCU also shows trouble codes 54 and 49. I've got a couple captures of the error and freeze frames with my bluetooth dongle (attached).

Here is the skinny I got from Mistsubishi. And I quote:

"As far as the Montero, From the Transmission end I would worry about the torque converter clutch circuit apply pressure which comes down to sealing rings and the valve body and the torque converter, There is a line pressure port for pressure testing, but thatís about it. The 4th gear code may be setting due to the lockup slipping. The solenoid code in the MFI may be setting due to failsafe if the trans did go into failsafe.

The trans fluid is Dexron 2 originally, SP3 is too slick. Dexron 3 is probably the closest that can be used.
 
The valve body has a common ground to the 3 solenoids

I would check the resistance from the TCM on each solenoid circuit. (the TCM will measure the voltage spike on deactivation to judge internal shorting of the solenoids.

Rebuilders sometimes use the clutches that fit but have the wrong friction coefficient. This will cause shift feel complaints.

My initial hunch is to focus on the code 49 in the TCM for the Torque converter clutch. On the scan tool item 23 and 31

(engine rpm and input speed sensor can be monitored to see if thet match somewhat (within around 50 rpm but 0 is perfect)"

I'm not a gear head- but what all this leads me to try:

1) flush and replace the fluid to ensure it's the right one and not causing slippage
2) conduct another pressure test (did this before with no problems)
3) check engine RPM and input speed sensor for alignment
4) maybe it's a bad torque converter clutch (in other words rebuild it again?)

I'm hoping to get some advice on where to go from here. Drop this transmission and start again with a different rebuilt? Rebuild it again with someone else and hope for a better result? Again- it drives fine. No symptoms other than the pesky check engine light.

I even did a stall test per the FSM and didn't see any problems.

Any advice on sources or remedies are greatly appreciated!

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