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post #1 of (permalink) Old 03-21-2001, 02:18 AM
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I have a couple of questions

First off my parking brake light stays on all the time?

second something sounds like it is ticking under heavy acceleration. it is especially noticable when it is in 5th
any ideas? trans, lifters, or exhaust

third, what do i need to make my tach work. i put in a msd ignition and there are two choices on adapters?

this is an 89 wrangler, manual with the peoguet trans
thanks jed

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post #2 of (permalink) Old 03-21-2001, 03:13 AM
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Re: I have a couple of questions

Parking light:- could be... low fluid, contact switch now closing, wires to portioning valve knocked off.. That's a start anyhow.
Ticking:- Bad gas, timing too high... If its only under load, I would think it's timing but I don't think you can change that on the 2.5l motor. What have you got?
Tach:- Haven't got a clue how the MSD hooks up, sorry.

'88 Sahara, 4.2, auto.
post #3 of (permalink) Old 03-21-2001, 09:28 AM
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Re: I have a couple of questions

I think Stooby pretty much covered the first two issues...On the MSD question, I ordered adapter part number 8910. I will be using the white wire connection for the MSD. I'll keep you posted on whether or not it works when I get it on there....[img]/wwwthreads_images/icons/cool.gif[/img]

Tommy B. in AZ -
More Guts than Brains.
[img]/wwwthreads_images/icons/tongue.gif[/img] WHASSSUP!?!?!?!?
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post #4 of (permalink) Old 03-21-2001, 04:09 PM
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Re: I have a couple of questions

The 'parking brake' light is for more than just the parking brake. Its also for reporting when the main brake system is having 'issues'.

There's a part (forget the name) in front of the booster and on top of the master cylinder.. sorta near the coolant bottle. This part equalizes fluid pressure between the front and rear brakes. There's a wire that goes into it that is used to warn when there is a problem w/ the pressures.

You could have a problem, or its mis-reporting a problem.

Check with your Haynes manual, it covers a test pretty well.

Sorry if my description was flaky...


'88 YJ, 4.2L, 32/36 Weber, Jacobs Ign.
post #5 of (permalink) Old 03-22-2001, 01:39 AM
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Re: I have a couple of questions

the motor is a 4.2liter sorry forgot to mention the old power house

post #6 of (permalink) Old 03-22-2001, 07:37 AM
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Re: I have a couple of questions

Sam is talking about the proportioning valve the same as Scooby mentioned. Chilton's or Hayne's can run you through diagnosing this problem.
No help here on the MSD
I think timing is a good possibility but I'm too green to diagnose without hearing the noise. Can you always hear it and it gets louder? I've heard a lot of noisy lifters too.

post #7 of (permalink) Old 03-22-2001, 02:55 PM
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Re: I have a couple of questions

Get under the dash, and behind the emergency brake lever you will see the switch that controls the light. Chances are it is not closing. You can loosen the nut and re-position it. Mine was like that for a long time before I isolated the problem.

92 YJ/4LI6/ 4"Superlift/ 32X115 BFG's/8K lb Superwinch/Yada, Yada, Yada,

Go Hard or go home
post #8 of (permalink) Old 03-23-2001, 08:37 PM
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Re: I have a couple of questions

On my jeep, the spring that holds the emergency brake pedal up (when it's released) occaisionaly doesn't, and the pedal is low enough to close the switch contacts. Oiling the mechanism helps.

Incase you are not aware, the MSD can be connected two different ways. You can either boost the ignition module output or bypass it. If you bypass it, your tach and knock senor are also bypassed. I haven't installed mine yet, but I'll be boosting the output instead of bypassing it. I didn't answer your question, just making sure you knew the options.

87 Cherokee 4.0, 90 Wrangler 4.2, 95 Wrangler 2.5
jerry is offline  
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