Question about 1990 Oldsmobile Eighty Eight

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1990 Oldsmobile 88 Royale acceleration and brake problems.

My 1990 Olds 88 has problems with both the acceleration and brakes. its got the 3.8L 3800 V6 engine, front wheel drive. i press the gas pedal and it has good initial acceleration, but tops out at about 80 MPH. its a V6, i feel like it should be able to go much faster. my 94 geo prizm with like a 2 L engine could get triple digits. And then theres the brakes. the lines, rotors, pads. Etc. were all replaced just a couple weeks ago. the brakes are generally good, but then sometimes i push the pedal almost to the floor before it starts to engage and the car wobbles/slides side to side a little bit. im not sure what the problem is.

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You could have a weak fuel pump causing it not to accelerate to a higher speed. The brakes going to the floor indicates that there may still be air in your brake system, ora bad brake booster not creating the needed vacuum for high velocity braking. The other thing is if you have an EBCM (Electronic brake control module) it could have dirty connections or just be going bad. Hope this helps.

Posted on Jan 19, 2013

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Posted on Jan 02, 2017

MNfisherman
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SOURCE: Pistons in both front calipers stay out, both calipers replaced

You may have a leak in the booster or master cylinder. You can put a pressure tester on the system to test for leaks. It does sound like you have an air leak.
You can try to bleed the master cylinder, then slave cylinder, then brake lines.

Posted on Aug 24, 2009

Transdoc
  • 829 Answers

SOURCE: I have a 1990 Olds

Check for vacuum leaks ie. rubber hoses and such. Clean throttle plate and bore with an aresol throttle body cleaner, use a toothbrush and remove all the black soot frome corners. this will keep the plate from closing all the way and cause high idle. If this does not resolve the problem also check to make sure the throttle cable is not stuck or in a bind and keeping the plate from closing. Theese are the cheap ideas, next will be having codes pulled and having someone look at data stream. i would suspect a bad idle speed control motor or trash on its plunger.

Posted on Jan 06, 2011

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1 Answer

How do you adjust the rear brakes on a 1990 Olds 88 Royale


Have to remove the rear brake drums &
turn the star wheel at the bottom
I think you need to take them completely
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OK.....turn key ignition on....can hear fuel pump doing its thing.....try to start engine....engine turns over easy....it almost wants to start....like it coughs a bit....but just doesn't come to life....


Get a fuel gauge and check the pressure. Should be around 40. Spray some carb cleaner into intake and see if it runs a moment then you know if you have a fuel related problem. Reply mine has 310,000 miles on it.

Sep 11, 2011 | 1989 Oldsmobile Eighty Eight Royale

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TIM.....

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1 Answer

Transmission problems


sounds like the bands in the transmission are burnt up!! I would say try changing the tranny fluid first and filter to see if you get any metal in the fluid and see if new fluid helps!

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1990 oldsmobile 88 Royale


hi hurdle
im dave

how do you know fuse is good?
sometimes just looking at it doen't prove that
you need to check it with a test light on both blades with either the brake pressed or the signal on. both sides of the fuse should light

Jul 20, 2008 | 1990 Oldsmobile Eighty Eight

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