My ABS is leaking from the bottom at a rate of about 5mm per day of driving measured from the reservoir max line. I am trying to find out if anyone has tried to bypass the ABS on a 90-93 Q45. Does anyone know if there is any history of removing the hard lines from the ABS and connecting them directly? Since I know the in and out lines from the manual, I am about to "t" off the fronts and connect the rear directly to each other using flared 10m x 1 to AN adapters and going into an AN male t union on the fronts and the same adapters to a straight through connecter on the rear. Please offer any advise on this procedure or if this may/will have adverse affects on my parts and/or braking. By the way, I already have steel Goodridge braided lines all around and I have upgraded the front brakes to twin turbo Z calipers (Utilizing custom adapted steel hoses). I also have a new oem stock replacement master cylinder, although the booster is original.
C-ya,
Claudio949-481-3655[email protected]
I modeled my Q after the one in the Xenon body kit ad. MOMO Extreme rims, Xenon ground effects & Stillen wing, (Body Pros color match), Borla 4" dual tips exhaust with 2" pipe from the Cats, Yokohama tires, Stillen strut tower brace, Q45t sway bar in rear, Twin Turbo 300ZX VHT painted red brakes on front, Stillen metal Matrix pads, Steel braided brake lines, new master cylinder, Red powder coated heads, Black powder coated manifold, Stillen Hi-Intake, Venom rebuilt injectors, new factory electronics throughout, and I am in the middle of a transmission rebuild.
Bypass ABS on '90 Q45 non TC and passive susp.
closer view of ABS
here is a closer view of the ABS
Thank you for your reply. The problem lead me to the alternative, which I have always pondered. I was ready to disconnect the ABS electronically as I have heard has been done regularly before, but now with the leak, I want to bypass it alltogether. at this point, I am looking at tops $50 in parts to eliminate it with the added benefit of enjoying more braking control. Of course, my last resort is to replace it and I would not post my inquiry as I did if that was what I wanted to do. I was posting to find out if anyone has had experience bypassing it so that I can consider their experience in my decision. Any advice accordingly would be appreciated.
Thank-you Q45Tech. Once again you have managed to optimistically and encouragingly offer thoughtful yet useless information. I suppose your customers at the Texaco there in beautiful Marietta appreciate this type of advice.
Let me repeat...I was posting to find out if anyone has had experience bypassing the ABS so that I can consider their experience in my decision. Any advice accordingly would be appreciated.
Let me repeat...I was posting to find out if anyone has had experience bypassing the ABS so that I can consider their experience in my decision. Any advice accordingly would be appreciated.
Claudio:
I am sorry you havent' found what you are looking for right away, but words such as the ones you have spoken to our most respected Infiniti Member, Dennis aka Q45tech, wont make you any friends.
If I was you I would EDIT YOUR REPLY before too many members READ it.
I wont edit it for you, like I could, but I doubt any member here will be willing to help you, once they read your response to Dennis.
Fred..:rolleyes
I am sorry you havent' found what you are looking for right away, but words such as the ones you have spoken to our most respected Infiniti Member, Dennis aka Q45tech, wont make you any friends.
If I was you I would EDIT YOUR REPLY before too many members READ it.
I wont edit it for you, like I could, but I doubt any member here will be willing to help you, once they read your response to Dennis.
Fred..:rolleyes
Help?
Honestly, this is the second such jaded remark from this Dennis character. My feeling is that he is on a God trip and needs to step down a notch, or step down period. If he wants to make a follow-up to "The Passion" about a Q45 than more power to him, but I won't be in line. If I feel that way, I am sure others do also.
C-Ya
C-Ya
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Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Be careful what you write on the web as it is cached for perpetuity was my point.When you discuss or solicit information on how to commit a felony, it may come back to haunt you was my other point about the insurance company.
Personally I could care less what any member does to their car but offering information to further such ACT is a conspiracy. These things are best discussed in private and not over a public "Communications Device" where in lies the Federal Felony!
If someone were to drive your car [or even ride in your car] [a valet or service technican or friend] and they [you] had an accident, you as owner would be sued because they have a reasonable expectation that a car oem equipt with ABS and no ABS light on has a working ABS. Not a braking system redesigned by the owner.
Take It from one who has been sued by a passenger whose injuries exceeded $250,000 in liability coverage. Unfortunately everyone in the at fault vehicle [with no insurance DIED]. Those who hit me. I wasn't at fault [jury awarded no negligence on my part] but my car was taken apart and inspected piece by piece for something my passengers attorney could blame on me.
Even the air bag software was read to determine my speed at the moment of brake application [lucky I was going just under the speed limit].
Golden Rules: Do your best to make sure the at fault driver survives to be sued......Make sure your passengers buckle up and don't remove the seat belts unbeknownst to you while in motion!
Personally I could care less what any member does to their car but offering information to further such ACT is a conspiracy. These things are best discussed in private and not over a public "Communications Device" where in lies the Federal Felony!
If someone were to drive your car [or even ride in your car] [a valet or service technican or friend] and they [you] had an accident, you as owner would be sued because they have a reasonable expectation that a car oem equipt with ABS and no ABS light on has a working ABS. Not a braking system redesigned by the owner.
Take It from one who has been sued by a passenger whose injuries exceeded $250,000 in liability coverage. Unfortunately everyone in the at fault vehicle [with no insurance DIED]. Those who hit me. I wasn't at fault [jury awarded no negligence on my part] but my car was taken apart and inspected piece by piece for something my passengers attorney could blame on me.
Even the air bag software was read to determine my speed at the moment of brake application [lucky I was going just under the speed limit].
Golden Rules: Do your best to make sure the at fault driver survives to be sued......Make sure your passengers buckle up and don't remove the seat belts unbeknownst to you while in motion!
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lessthanjakejohn
- Posts: 4105
- Joined: Fri Oct 25, 2002 6:39 am
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lessthanjakejohn
- Posts: 4105
- Joined: Fri Oct 25, 2002 6:39 am
o.k., o.k., I get it, jeeez... Anyway, you are probably right. This is still a family car and I am driving kids around so I'll be cool. I'm still fighting the sports car feelings...You should what I mean know race tank boy. Someone said there was a person parting out 90-93 Q's. Please direct me and I'll re-think my efforts. Keep up the good work.
C-ya
C-ya
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Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Anyway most people can't out brake an ABS system assumming the tires are the ones used to calibrate the software. Possible in dry weather but you will flat spot the tires and make them unusable afterwards.
You study what the oem tires are/were that tells you HOW AGRESSIVELY the engineers tweaked the system.
The first reason ABS has a system memory was for engineers to exercise the system and easily read parameters for tweaking.....all the data was available at one port. Same with air bags.
The record of the accident is just a by productThere is a reason why oem tires are 200 treadwear index......so they can score well in magazine test......then get out of any responsibility fast as the tires wear out and owners have to chose a replacement.
When dealers buy tires for replacements they do not come from Nissan but via a local tire wholesaler........the factory get off the hook.
My usual compliant is most people including myself don't run tires as soft and fast wearing as oem. So we all have longer than possible braking distances.
I remember back in 1996-1999 when I tried 4 different front [2 factory and MM and KVR] brake pad compounds to solve my aggressive mountain driving itch............now T3 stocks nothing but factory pads, we have a pile of aftermarket junk [they won't take it back], just like the pile of Bosch +4 spark plugs. and KVR drilled [too many holes] rotors.
Other than Eibachs, Tokico Blues, Power Stop rotors and Stillen upper links and tension rods, some German light bulbs........everything is oem.
We really prefer that customer bring their own aftermarket parts for liability reasons.
You study what the oem tires are/were that tells you HOW AGRESSIVELY the engineers tweaked the system.
The first reason ABS has a system memory was for engineers to exercise the system and easily read parameters for tweaking.....all the data was available at one port. Same with air bags.
The record of the accident is just a by productThere is a reason why oem tires are 200 treadwear index......so they can score well in magazine test......then get out of any responsibility fast as the tires wear out and owners have to chose a replacement.
When dealers buy tires for replacements they do not come from Nissan but via a local tire wholesaler........the factory get off the hook.
My usual compliant is most people including myself don't run tires as soft and fast wearing as oem. So we all have longer than possible braking distances.
I remember back in 1996-1999 when I tried 4 different front [2 factory and MM and KVR] brake pad compounds to solve my aggressive mountain driving itch............now T3 stocks nothing but factory pads, we have a pile of aftermarket junk [they won't take it back], just like the pile of Bosch +4 spark plugs. and KVR drilled [too many holes] rotors.
Other than Eibachs, Tokico Blues, Power Stop rotors and Stillen upper links and tension rods, some German light bulbs........everything is oem.
We really prefer that customer bring their own aftermarket parts for liability reasons.
Any good DOT 4 fluid will be fine, just change it every two years to avoid future ABS block failure. A Griot's Garage vacuum bleeder is my weapon of choice to change brake fluid. Luckily the 90 ABS unit has bleeders on it so the installation is just R&R and bleed the unit, then the calipers. I'd spring for a new unit from Scottsdale, expensive but you must have enough since you spent a ton on the cosmetics before cleaning up the mechanicals!
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Q451990
- Moderator
- Posts: 11030
- Joined: Tue Jul 23, 2002 8:21 am
- Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
- Location: Columbia, SC
- Contact:
You can also get a remanufactured unit... the one I had remaned by A1 Cardone has been leak-free and works fine. Had it done in 2000. If you have a Pep Boys locally, have them look it up. They may need to send yours off, or try to buy a core in a salvage yard if you can't afford a 10-14 day down time. The OEM replacement was about $1200 vs. about $300 for remanufactured back in 2000.
Heath
Heath
Here's an ABS Pump on e-bay. I dont know if it fits on your car but check it out.
http://cgi.ebay.com/ebaymotors...33560
Good Luck
http://cgi.ebay.com/ebaymotors...33560
Good Luck
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Q45tech
- Moderator
- Posts: 14296
- Joined: Tue Apr 30, 2002 3:19 am
- Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
The thing we focus on in buying a blown wreck is the condition of ABS because a good used one can be worth $400- $600........since 90-93 are interchangable. We can almost always get $2,000-$3,000 of revenue from a blown Q.........but the car takes up space for a year while its stripped [and the techs can do it in down time].
I think every old Q owner should have a few junkers in the back yard.
If it hasn't leaked it probably won't at least in the 12k/12 month warranty we provide after a good multiple flushing.We charge $1,000 including labor to exchange a goos used pump.
Better than paying a junk yard $500 to deliver and never seeing the cars condition [the master cylinder].
I think every old Q owner should have a few junkers in the back yard.
If it hasn't leaked it probably won't at least in the 12k/12 month warranty we provide after a good multiple flushing.We charge $1,000 including labor to exchange a goos used pump.
Better than paying a junk yard $500 to deliver and never seeing the cars condition [the master cylinder].