recently bought 99 nsx, previous owner neglected to tell me abs was disconnected. Fuse missing in box and no abs lite on dash. Replaced fused and abs works but pump comes on every 30 to 45 seconds to recharge system. Flushed abs system hoping maybe solenoid was stuck but no succes there. Short of replacing modulator, very pricey, anyone got any other ideas? thanks
abs problems
- Thread starter yesican
- Start date
Did you excersice the solenoids individually? They can be operated manually by applying 12VDC to the connectors, which sometimes, after opening and closing them several times, can free their operation. If your not leaking fluid there's a chance this could work. Was the original fluid that came out real contaminated? Was the person you bought the car from very mechanically inclined (I ask, because if they were, they probably tried already)?
Good Luck!
Good Luck!
Alternatively, and sadly, the most likely scenario is the previous owner new there was a problem and disconnected it. Hopefully I am wrong and exercising it may solve your issue.
I will try exercising the solenoids individually, cant hurt. There was no debris in the fluid I flushed. I am afraid that the previous owner knew and just was honest enough as he also was not truthful about some other issues. All in all tho, it's a great car, I can fix, or not, the things it needs, and I certainly appreciate the input.
Well I'm glad the car fell into capable hands. Mine was neglected when I bought it too, but I was happy to bring it back to mechanical specs. After working on so many average vehicles it was nice to be able to bring back a truely amazingly engineered car and feel the results.
Good Luck and Happy Motoring!
Good Luck and Happy Motoring!
When the pump is running and/or just after it stops is the reservoir bubbling?
I recently picked up a 91. The seller was honest and told me the fuse was removed because of the ticking. I reinstalled the fuse and it ticked for a few hundred miles but now it stopped ticking and the Yellow Anti Lock Brake light is on. THe fuses are still in there and fine. I was wondering what my next step should be? Fluid Flush? Exercise the solenoid? I would like my abs back.
The system is not holding pressure, which causes the pump to run excessively. If the pump runs too long, it will overheat so the computer shuts it off and turns on the yellow ABS light. You can try a fluid flush and solenoid exercise using the DanO method, actuating each solenoid individually. It might restore a good seal and ABS will be up and running. If not, you probably need to clean and rebuild the solenoids as shown in another thread here on Prime. Or, you can upgrade to the 2001+ system using SOS's kit. I went to Radio Shack, spent $20 on wires, switches and alligator clips and built the kit DanO recommends. My pump was acting up and the flush procedure cured it. ABS works great now and I will do the flush every year.
Hey Larry, no bubbling in the reservoir but the fluid is low and then bleeds back to normal level. This tell you anything? thanks for input!
I've flushed my 91 and exercised the solenoids several times in the last year. It works for a while, and then one of them sticks again. Anyone know if a different type of brake fluid (synthetic or silicone) helps eliminate the sticking?
They are not sticking. There is dirt stopping them from sealing. When you exersize the solenoids the contaminates may move away from the o-ring allowing them to seal or be in place so limited leakage. Later, they will leak again. The true method is to dissemble, clean, reassemble the modulator assembly.
