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7

If you've changed the calipers and the pedal now goes all the way to the floor, chances are that you've introduced air into the system whilst you had the calipers off. To fix this, you need to "bleed" the braking system. At each brake caliper / wheel cylinder there is a bleed nipple or bleed screw. The basic procedure is to start at the wheel furthest ...


4

Not sure on your particular vehicle, but most auto-adjusting drum brakes work when applying the foot brake (not parking brake) while the vehicle is in reverse, so whenever you back out of a parking space and hit the foot brake, the brakes adjust. EDIT: There is a device within the braking assembly which looks like this: There is a lever arm attached to ...


4

If your brake pedal went to the floor it means that there was not enough hydraulic pressure to apply the brake. If they were working fine before and never felt squishy then your master cylinder has probably gone out and needs to be replaced. Alternatively you may have a lot of air in the lines, enough that the pressure applied by the brake was not enough to ...


4

1989 is OBD1, my favorite scanner for this vintage GM product is a Snap-On MT2500, you can find them on eBay fairly reasonable. Be sure the scanner comes with the GM1 aldl adapter, a Primary cartridge and a Troubleshooter cartridge and cables for your model year. You can short the proper pins (image below) to get the check engine light to flash any codes ...


4

There are scanners that will talk to OBD1 computers, but most shops (I would guess) don't have the equipment anymore. I got rid of my OBD1 equipment last year. I've seen ≤ 2 cars that required me to use it in the past 4 years. Maybe a GM dealer would still have the equipment. You would have to call around and ask. By jumping pin A to pin B on the ALDL ...


4

The head unit will supply enough power to the stock speakers. You will not need to amplify the signal. Doing so will likely blow the speakers. If you replace your stock speakers with higher wattage speakers, you may need an amp with the channels to power these. A one or two channel (bridgeable) amp is sufficient for the subwoofer(s). When I had a system, ...


3

Sounds like you have 2 problems. Brake pedal that goes down to the floor at a red light is a bad Master Cylinder, replace it Common issue as cars get higher mileage is the Thottle Body and throttle plate get gunked up, use an approved throttle body cleaner in a spray can to thoroughly clean the TB and idle air control valve and passage.


3

Number 1 looks like your intake manifold and number 2 is your intake hose leading to the throttle body. If 2-3 ounces of oil come out of #1 when #2 is removed, that's ok. It's most likely oil that's been pushed up by the PCV (Positive Crankcase Ventilation) hose. (Your motor doesn't have a PCV valve, just the hose with a filter on it. Ahhh, Chevy...). If ...


2

I have seen this behavior with a bad ehcu but is rare, they have an internal valve for each wheel, but it does happen. Internal collapsed brake hose I have seen many times, also sticking calipers use to be common but I hardly see that anymore since they went back to steel pistons. Steel piston calipers can do this but requires a lot of internal corrosion on ...


2

Goodness, this could be just about anything. What setting is the heater, ventilation and Air Conditioning (HVAC) set at? I'd expect this as normal if the A/C compressor is engaged (which it is in normal A/C modes, plus defrost and defog modes...) I wouldn't necessarily expect fuel related issues with this description, but it would be nice to see if there ...


2

I have a 97 suburban. I am not sure how similar things are. I have replaced lines/hoses/calipers/wheel cylinders on this truck and spent hours of time and over a gallon of fluid trying to get it bled correctly. A couple things that I've learned and have helped. If the master ran dry, be sure to bench bleed the master and ABS. Remove the lines, install ...


2

So you've replace a bunch of coolant related components and you want to know if anything leaks? You can borrow a coolant pressure tester from you local autoparts store in many locations (leave a deposit). You will place the tester on the fill cap (no matter where it is), pump up the pressure and then note the pressure on the gauge. Give it a few hours, ...


2

On that year Impala the lower stop lights pull power from the hazard switch and from there to the multi-function switch. You'll need to pull steering column covers and check for power out of the multi-function switch on the yellow and dark green wires. If you don't have power on either wire, check the turn signal fuse. If the fuse is OK check for power from ...


1

+1 on @Moab's answer about the master cylinder, that is a classic symptom of a bad master cylinder. In regards to the revving when not on the gas, it sounds like your ECU is getting confused by something. If you have a check engine light on pull the codes and see if there is a component failing. Another thing to check for is a vacuum leak. If air is ...


1

If you have fluid in the brake reservoir, and have no pedal, you have a failed master cylinder. The piston that moves when you step on the brake pedal has o-ring seals that if they fail, can allow fluid to pass by them and not apply pressure to the brakes. All brake systems today have a dual circuit system where if you loss pressure to a wheel (caliper, ...


1

There are two places this could be: ICM or Optispark. The intermittent nature of it leads me to believe it is ignition related. On your year of LT1, ignition issues can pretty much be boiled down to these two things (as you are describing). Just because you've replaced the ICM, does not mean it isn't at fault. Usually the way the engine dies with an ICM ...


1

Since the fuel pressure is good you may also want to check for a vacuum leak. Sometimes a vacuum leak can cause intermittent problems such as this because it may be partially sealed at times. I would carefully check all of the vacuum hoses and the intake boot for cracks or holes.


1

Brown fluid is common in higher mileage automatic transmissions, especially if they do not get regular fluid changes. Red ATF turns brown when it is worn out and the clutches in the transmission start slipping, creating friction and burning the fluid, turning it from red to brown. I don't think it is anyone's fault, its just time for a transmission ...


1

89 is OBD1 and requires specific connectors and a OBD1 scantool. You can jump pins A & B on the ALDL (Assembly Line Datalink Connector located under the driver side dash) to make the MIL flash out codes.


1

My suggestion is to check the fuse first...it's fuse #14 for low beams. If it "pops" out then you will have no low beams. Same for high beams. The two have two different fuses.



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