20 Most Recent 1988 Pontiac Bonneville Questions & Answers

Question edited for clarity and add maker. Question moved to make model category. LOC is LOCked. This is the three ways to get a radio code. https://www.fixya.com/support/r29874205-need_vehicle_radio_code ..

All, well, mostly all, carburetors are located right in the center of the engine, on top of the head block. Some have a black cover, so to see the carburetor, you must remove that cover.

see below diagram I couldent put it all in one message we are restricted how many items we can put in one answer

see below starting with # 1 cylinder at TDC.

do you have a bad crank sensor and the injectors are not firing ?

It may not be a bad spot in the wire, it could be a bad pump thats tied up, or a bad relay, you need to run 12 volts directly to the pump to see if it runs, if it dosent than theres your problem, if it does than it could be the relay.

All relays are located at the center rear of the engine compartment, below the left side under-hood fuse block (behind the maxi-fuse/relay center cover). There should be a diagram under the cover, that will direct you to the relay you seek.

If you dont have the owners manual, ask your dealer, look in your local library or eBay.

I know thta this isnt your answer, but is the unique way to solve it.

Your transmission fluid runs to your cooling system to cool the transmission oil. So, in answer to your question, one of the two transmission lines (one in, bottom and one out, top) could be leaking from the cooling system.

Bring your vehicle in for a cooling system pressure check. Another thing to keep in mind when inspecting leaks is that where you see the leak may not necessarily be where the leak is from. While the leak will drip down, the wind from when you're driving will splatter the leak all over the under-carriage of your vehicle making it look like leaks are happening where they in fact, are not.

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check out walmarts tire chart online

hope this helps

that means engine is not running on all cylinders, this should be fixed asap

May be the timing chain. I had an 87 that did the same thing. See if it will start by squirting some starting fluid in the throttle body to make sure it's not a fuel issue.
You can check for spark by pulling a plug wire off, inserting any spark plug to the wire, and holding the base of the plug to a metal part of the engine. You should see the plug sparking when the engine is cranked.
An improper but effective way to check for compression is to disable the ignition to avoid backfire, removing the boot to the throttle body, and holding your hand over the opening of the throttle body. If the timing chain is good and you've got any compression, you will feel suction on your hand. If the chain or gears have failed you will feel suction followed by blowing out of the throttle body.

1987-88 Pontiac Bonneville Stereo Wiring Constant 12V+ Orange Switched 12V+ Yellow Ground Black Illumination Gray Dimmer Brown Antenna Trigger Pink Antenna Right Front Front Speakers 4" x 6" Dash Left Front (+) Tan Left Front (-) Gray Right Front (+) Light Green Right Front (-) Dark Green Rear Speakers 6" x 9" Rear Deck Left Rear (+) Brown Left Rear (-) Yellow Right Rear (+) Dark Blue Right Rear (-) Light Blue

May be a broken or cracked flywheel

relay fuse usually under hood lack of fuel means the block is behind the filter turn it on and listen to the pump

go to google and search "firing order 88 pontiac/gm (motor size and type,i.e.: 350 V-8, 4.3 L V-6)"

Check fuel pressure in the fuel rail or replace the fuel pump in tank if fuel delivery problem persists.