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I have 3/4 ton 87 suburban rear wheel drive with a 454. thinking of swapping engine with a 350. I would probably have to chang the PCM, and linkage, and exhaust. Can't think of a reason not to...

Replaced the fuel filter and the coil. Improved the missing out somewhat. still doing it. I rented a fuel pressure gauge form the local parts place and it was broken. Waiting for them to get a...

Figured out the problem. Had a stuck proportioning valve. Tapped it a couple of time with a small hammer. Then unhooked the front line form the master cylinder. Plugged the master cylinder and...

Is changing the lines pretty complicated? I was considering disconnecting the line and blowing them out.

Have now put on two master cylinders. The first one was leaking. Replaced the rear wheel cylinders and the proportioning valve. Again tried to bleed them and get just a trick out of the right...

thanks for the reply. I will check all those things. Replacing the fuel pump will be my last resort

Have put on a 2nd master cylinder. The first one was leaking. A right rear wheel cylinder. Getting a little fluid out of the new wheel cylinder. disconnected the rear line to the proportioning...

Disconnected the rear side of the proportion valve get a weak stream of fluid. With the rear wheel cylinder off I get a stream but it is not strong. petal is mushy. brake light is on I have...

Have a 1998 1/2 ton with a 5.0 2 wheel drive. Great truck runs well when running properly. Idles great takes off well bu about 20 mph and above it will miss badly. My mechanic though it might...

Sorry was in a hurry. Did not edit the post. It is a 454. R-20 is 3/4 ton rear wheel drive. When I got it smogged here in California the mechanic told me that it had a bad O2 sensor because it...

I don't think I am getting that good of mileage. I will be doing some checking.

1987 r-20 with 254ci

i can't seem to find the O2 sensor. Any help?

sorry 454ci

I recently purchased a 87 r-20 3/4ton 2 wheel drive. I am wander if someone could tell me the gas mileage range I should expect.

Took off wheel cylinder and got a good stream from the brake line when brakes pumped. Will replace the wheel cylinder . can the wheel cylinder get clogged and not bleed?

Took the wheel cylinder off the right rear and pumped the brakes. Got a good stream out of the brake line. got new wheel cylinder and will put it on. Is there a way that the cylinder could be...

I posted earlier but put in the wrong spot. I have 87 suburban with 454. The rear brakes are not working. I went to bleed them and am not getting any fluid from the rear brakes. The pedal...