High temp woes

[RCP Phx]

You've got something going on that needs fixed, fan clutch maybe?

 

[Vitzaa]

You've got something going on that needs fixed, fan clutch maybe?

I know man, I'm honestly clue less. It's heavy but the stroker should be able to handle the extra weight.

The fan is a new napa one. Nothing leaking out of it and I'm able to stop it on a cold engine with a rolled up news paper and the paper gets shredded when the motors hot.

 

[RCP Phx]

Also, I'm wondering if throwing it on a Dyno is the ideal way to get things squared away with tuning... Does anyone know a Dyno shop in northern Cali that can work some magic?

Dyno work can tell a lot, when I built my Russ P stroker I took it to the dyno 4 times to maximize its performance

 

[Vitzaa]

Just found out my efan isn't turning on... Won't turn on idling with the ac. I disconnected the coolant temp sensor and it still didn't kick it on after 20seconds.

Fuses are all good, had a spare relay and replaced it, still no dice...

Took the power probe out and gave relay plug 87 some juice, no dice...

Any ideas where I should be looking next? I'd hate to start tracing wires

 

[Vitzaa]

I've got continuity between relay connector 87 and the plug for the efan

I've also got continuity between relay connector 85 and C2 in the pcm connector

 

[Rob Mayercik]

Could the catalytic converter be plugging up, causing excess load on the engine at higher speeds?

 

[Vitzaa]

Could the catalytic converter be plugging up, causing excess load on the engine at higher speeds?

Ya I thought was the case initially and replaced the mini cats as my previous engine guzzled up oil... Made a difference but still dealing with the overheating... Thank you though!!

I'm waiting on the ac high pressure switch to arrive to see if it'll fix the electric fan issue... Then gonna switch radiators to a stock one.

Still hoping to find a Dyno shop that can tune things

 

[Rob Mayercik]

Doesn't this thing have another catalytic converter back by the transfer case? Have you checked that one?

 

[Vitzaa]

I'm just running the two mini cats

 

[Vitzaa]

Just an update in case this comes up in a future search for others...

Ended up replacing the radiator with a cheap spectra brand. World's of improvement. Takes longer to heat up and stays below 220 on the hwy. Still creeps a degree or two every 5 seconds at idle though...

I turned on the AC while driving and the temp went up to 235. Fan still not turning on so I ordered a high pressure switch for the AC, hoping that'll fix the fan issue as I can't figure out why it's not turning on otherwise.

Gonna replace the water pump to a flowkooler again next (hesco ones are in backorder everywhere), unfortunately, I tossed mine when I replaced it so am just waiting on the new one to arrive.

At this point I'm pretty sure it's gotta be something with the computer timing, just can't find a Dyno shop in northern California that can tune this thing...

 

[Vitzaa]

I also cut open my original damaged and clogged mishimoto radiator and the cores they use are separated into multiple small passages.

New item by victor agaronov

photos.app.goo.gl

 

[Vitzaa]

Final update on this.

I'm now running perfect temps.

Did a better job purging air out of the radiator and installed a air bleed screw into my coolant filter housing. Also ended up fixing the efan.

Outside temps today were in the 90's
Street driving I'm around 200
Highway around 210-212
AC on it's a steady 210 or less on hwy
Uphill sustained max 215

Seems the issue was the mishimoto radiator.

Thanks for all that contributed earlier in the thread!

 

[Jeep ride 2nd]

Glad it's fixed , thanks for the update.

 

[Cliche323]

Final update on this.

I'm now running perfect temps.

Did a better job purging air out of the radiator and installed a air bleed screw into my coolant filter housing. Also ended up fixing the efan.

Outside temps today were in the 90's
Street driving I'm around 200
Highway around 210-212
AC on it's a steady 210 or less on hwy
Uphill sustained max 215

Seems the issue was the mishimoto radiator.

Thanks for all that contributed earlier in the thread!

This is awesome new man - I'm running into the same issue and was looking at a mishi rad. I'm glad you figured it out, time to knock out the basic cooling stuff and just get an OE rad. Cheers!

Edit: what was your fix with the efan? Mine does not like to kick on

 

[Vitzaa]

This is awesome new man - I'm running into the same issue and was looking at a mishi rad. I'm glad you figured it out, time to knock out the basic cooling stuff and just get an OE rad. Cheers!

Edit: what was your fix with the efan? Mine does not like to kick on

Just give the system a good cleaning before replacing, the ascorbic acid worked phenomenally....

The champion bc1193 seems to be a great radiator as well, I was going to head in that direction but decided to try the spectra as it's so much cheaper.

Definitely stay away from mishi, I don't know WTF they're thinking with their core design.


I had a broken ground wire at the connector plug. It looked normal but was internally detached

 

[maxbraketorque]

Final update on this.

I'm now running perfect temps.

Did a better job purging air out of the radiator and installed a air bleed screw into my coolant filter housing. Also ended up fixing the efan.

Outside temps today were in the 90's
Street driving I'm around 200
Highway around 210-212
AC on it's a steady 210 or less on hwy
Uphill sustained max 215

Seems the issue was the mishimoto radiator.

Thanks for all that contributed earlier in the thread!

Its been known for several years that the Mishimoto XJ radiator easily clogs. If I had seen this thread sooner, I would have commented. Glad you finally found out.

Did you get the efan fixed?

 

[Vitzaa]

Its been known for several years that the Mishimoto XJ radiator easily clogs. If I had seen this thread sooner, I would have commented. Glad you finally found out.

Did you get the efan fixed?

Ya I wish I knew this about the radiators. Would have saved myself a ton of time and money chasing this fiasco.

Ya the efan has a broken ground.

Thanks man!