06-18-2020, 05:01 PM
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#1
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Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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Member
Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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Lean Bank 1 with Supercharger? Solved
Thought I would share in the event anyone else runs into a similar problem. After the 4WD conversion I finished up the rest of the parts including TRD headers, some new PCed valve covers, VCG etc. Also coated the supercharger, which is a gen 1 that I rebuild two years ago.
Take everything out for a few shake down runs and after a few miles, bam, CEL. This is odd for me as I have replaced everything possibly damn near it with OEM bits and I have pulled that blower probably 20 times or more. I know I didn't miss anything. Pull codes and I am tossing a lean bank 1... SOB. I have a 7th injector and usually run slightly rich.
So.....
- New O2 sensors front and rear
- New OEM MAF was installed a few weeks ago
- Said screw it and tossed in a spare Walbro 450 from my turbo beemer
- Another new TB gasket
- New OEM plug wires
- New plugs
- All vac lines are new and sealed
I finally decided to just check everywhere a vac line terminated. First thing I check is the bypass valve. Remember how I said I rebuilt the blow? Well I did it all aside from the bypass solenoid. Immediately I realize it has NO seal, the diaphragm blew. Quick bypass and the truck is better than even. Jump on Jon Bond, little next day air and BAM. Back in action and better than ever.
Hope this helps someone!
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06-18-2020, 08:31 PM
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#2
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Elite Member
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Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
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Elite Member
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
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A Walbro 450? Man, that fuel return line is probably shooting out like a fire hose!
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06-19-2020, 12:42 AM
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#3
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Join Date: Dec 2019
Location: SW Washington
Posts: 595
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Member
Join Date: Dec 2019
Location: SW Washington
Posts: 595
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Looks like a radiator should be on your short list.
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Owned 82, 83, 87 pickup, 98, 99 SR5 4runner
Currently own a 98 SR5, 5spd, 4x4, e-locker, no sunroof. 2012 LTD with the normal options.
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06-19-2020, 02:58 AM
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#4
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Join Date: Jul 2019
Location: Silent Hill
Posts: 282
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Member
Join Date: Jul 2019
Location: Silent Hill
Posts: 282
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I'll second that motion, replace that rad stat!
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There's danger lurking around every corner, that's why I propose we make all of our buildings round.
I don't remember the time I was human that's why I don't understand anybody.
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07-04-2020, 01:50 PM
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#5
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Member
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Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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Member
Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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I am a BMW N54 guy as well, lol. I had a few new ones sitting on a shelf and said to hell with it, but yeah I should probably drop in a smaller pump. No issues so far, I was surprised the fuse did not pop.
Quote:
Originally Posted by gamefreakgc
A Walbro 450? Man, that fuel return line is probably shooting out like a fire hose!
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07-04-2020, 01:53 PM
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#6
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Member
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Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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Member
Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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I know, I have done so much work to the truck and keep forgetting to order a new one. Aluminum rad and timing belt service are last on the list. I can't believe the rad is still solid. PS cooling is bypassed but I run this thing hard in Texas heat, 11 PSI and no issues with cooling... it's coming
Quote:
Originally Posted by Dieselchessy
Looks like a radiator should be on your short list.
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Quote:
Originally Posted by 2TH4IST
I'll second that motion, replace that rad stat!
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07-04-2020, 02:28 PM
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#7
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Elite Member
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Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
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Elite Member
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,330
Real Name: Jerod
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Quote:
Originally Posted by ATX3rdGen
I know, I have done so much work to the truck and keep forgetting to order a new one. Aluminum rad and timing belt service are last on the list. I can't believe the rad is still solid. PS cooling is bypassed but I run this thing hard in Texas heat, 11 PSI and no issues with cooling... it's coming
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If it helps at all, I'm still on the stock radiator that's been replaced once. I am in the sweltering Sacramento heat that rivals what you get in Texas, our temps between June - September go from 90 - 105 on a normal day. We had 108 last week. TRD 170 degree thermostat and a water wetter product (Royal Purple Ice) keep my temps below 200 all the time, even with A/C in city driving.
But an all aluminum larger radiator definitely would also be a good choice. Just providing a cheaper alternative.
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07-06-2020, 09:01 PM
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#8
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Member
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Join Date: Nov 2015
Location: Nevada City
Posts: 224
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Member
Join Date: Nov 2015
Location: Nevada City
Posts: 224
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I have a 1st gen supercharger also. What did you use to seal the bypass solenoid? I'm always curious how this doesn't leak more...
Quote:
Originally Posted by ATX3rdGen
Thought I would share in the event anyone else runs into a similar problem. After the 4WD conversion I finished up the rest of the parts including TRD headers, some new PCed valve covers, VCG etc. Also coated the supercharger, which is a gen 1 that I rebuild two years ago.
Take everything out for a few shake down runs and after a few miles, bam, CEL. This is odd for me as I have replaced everything possibly damn near it with OEM bits and I have pulled that blower probably 20 times or more. I know I didn't miss anything. Pull codes and I am tossing a lean bank 1... SOB. I have a 7th injector and usually run slightly rich.
So.....
- New O2 sensors front and rear
- New OEM MAF was installed a few weeks ago
- Said screw it and tossed in a spare Walbro 450 from my turbo beemer
- Another new TB gasket
- New OEM plug wires
- New plugs
- All vac lines are new and sealed
I finally decided to just check everywhere a vac line terminated. First thing I check is the bypass valve. Remember how I said I rebuilt the blow? Well I did it all aside from the bypass solenoid. Immediately I realize it has NO seal, the diaphragm blew. Quick bypass and the truck is better than even. Jump on Jon Bond, little next day air and BAM. Back in action and better than ever.
Hope this helps someone!
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__________________
02 SR5, manual hubs, 3” lift, airbags, 5-speed swap with locking center diff, 1st gen supercharger, URD 7th, BAMF sliders.
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07-24-2020, 01:31 PM
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#9
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Member
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Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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Member
Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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I am also a BMW guy so I am cracking up that this thing has lasted so long. I went ahead and pulled the trigger on a Koyorad last night.
Quote:
Originally Posted by gamefreakgc
If it helps at all, I'm still on the stock radiator that's been replaced once. I am in the sweltering Sacramento heat that rivals what you get in Texas, our temps between June - September go from 90 - 105 on a normal day. We had 108 last week. TRD 170 degree thermostat and a water wetter product (Royal Purple Ice) keep my temps below 200 all the time, even with A/C in city driving.
But an all aluminum larger radiator definitely would also be a good choice. Just providing a cheaper alternative.
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07-24-2020, 01:37 PM
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#10
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Member
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Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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Member
Join Date: Oct 2017
Location: Austin, Texas
Posts: 83
Real Name: Kyle
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When I got mine it was caked with orange RTV. My first thought was "There has to be some kind of sealing method way better than this...". My trick has been to clean the joints of all sealant and run the Job Bond o-rings lubed with some oil.
I agree it is a weird design as the elbow "floats" but one it sees pressure it basically sets the o-rings.
Bypass O-ring set – Jon Bond Performance LLC
Quote:
Originally Posted by anniesball72
I have a 1st gen supercharger also. What did you use to seal the bypass solenoid? I'm always curious how this doesn't leak more...
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07-25-2020, 11:14 AM
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#11
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Member
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Join Date: Nov 2015
Location: Nevada City
Posts: 224
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Member
Join Date: Nov 2015
Location: Nevada City
Posts: 224
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Thanks for the info
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02 SR5, manual hubs, 3” lift, airbags, 5-speed swap with locking center diff, 1st gen supercharger, URD 7th, BAMF sliders.
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10-26-2021, 09:58 PM
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#12
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Member
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Join Date: Sep 2017
Location: Sacramento, California
Posts: 196
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Member
Join Date: Sep 2017
Location: Sacramento, California
Posts: 196
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Quote:
Originally Posted by ATX3rdGen
When I got mine it was caked with orange RTV. My first thought was "There has to be some kind of sealing method way better than this...". My trick has been to clean the joints of all sealant and run the Job Bond o-rings lubed with some oil.
I agree it is a weird design as the elbow "floats" but one it sees pressure it basically sets the o-rings.
Bypass O-ring set – Jon Bond Performance LLC
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This seems to be my issue as well. Ordering those o rings right now.
did you replace only the orings or anything else?
__________________
'99 Millenium Silver SR5 | 5.29 Nitrogears/ARB lockers | 35s | Supercharged
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