Buick Roadmaster - Fuel injecters not comming on

35

Asked by Oct 10, 2015 at 01:05 PM about the 1994 Buick Roadmaster

Question type: Maintenance & Repair

The Curse>
94' Roadmaster 37k miles (that's Right its 2015!) nice Okay
New tires                                 $400+
New Shocks                             $89
New Fuel Pump / Strainer       $80
New F/P Regulator  Adj.          $105
New Copper gas lines 3/8 30'  $36
New Fuel Filter                        $18
New fittings conv. to copper     $30
New Air Filter                           $10
New Engine Oil + Filter            $20
New Trans Filter + Oil              $50
New Iridium Plugs                    $80
                                       Total $918
*Fuel sys clean and pressure @ 45
*Good battery borrowed W/ charger

I've gone through 2 cans of starting fluid. It really tries to start, but only
runs through the starting fluid. All fusees and F/P relay working. Injectors have power when key is on. It sounds very healthy when it cranks. Cleaned all connectors with silicone-ized TV cleaner. Replaced all cracked vacuum line. Visually checked computer circuit boards for obvious smoked components and all is fine.  Dash lights look normal when starting. KeyPass light comes on for 3 seconds then turns off. I crank but its like its not getting fuel. F/P comes up to full 45psi with two switches to on. F/P slowly leaks down to 10psi in about 25 min. No codes active (A-B paper clip), but fans come on in code mode.

Computer or PassKey ???  What the "F"...

HELP !!!

6 Answers

65,075

If this car has been sitting the fuel injectors may very well be gummed up with varnish. Why did you replace the fuel pump? Was it not working? Same questions about the fuel pressure regulator. If these fuel system components weren't working, most likely there's varnish in the injectors. HTH. -Jim

35

Yes, it was sitting for many years. I cleaned the varnish out of the tank with denatured alcohol. Everything else was replaced by default. I looked down the fuel rail where the pressure regulator attaches and there was no evidence of varnish. I thought about hot wiring an injector (less than half a second) to see if there is a pressure drop on that static key off pressure. I know what you are saying. I just find it unbelievable all eight injectors are glued 100% shut. Should I manually exercise them? No fuel pressure to avoid flooding hydro lock. Thanks, Jeff

1 out of 1 people think this is helpful.
65,075

I would. Especially if you have pulse at the injectors and fuel pressure at the fuel rail. Anywhere gasoline was is a suspect for varnish. HTH. -Jim

35

Okay, The injectors are coming out. I will immerse the tips in denatured alcohol in a small ultrasonic cleaning tank. Outside just in case there is a fire. Wow, what a job! I'm off to do good things, hopefully.

1 out of 1 people think this is helpful.
35

Bingo! Fixed - It purrs like a kitten. I took the injectors out and did a reverse flush with about 6cc of denatured alcohol. I used tubes at each end and a suringe. A small 1.5 amp motorcycle charger was just right to energize the injector. About 2cc of old stinky gas came out each one. Then I jumped the F/P to pressurize the rails before each prime. Next I energized each injector for about 1-2 seconds to prime. Each time the static pressure dropped about 25 pounds. I did this for all eight injectors. Before this, I thought the small amount bad gas in the injectors would have flushed out after cranking 35 times and almost 2 cans of starting fluid. Lesson learned: You need to flush and prime the injectors too. If you have stinky old old gasoline there is no short-cut.

1 out of 1 people think this is helpful.
65,075

Awesome!! Very glad to hear that!! Thanks for letting us know. -Jim

Your Answer

Add photo

Related Questions

  • what prices are they worth in mint condition 3 answers

    around how much are they wourth in mint condition?

    1993 Buick Roadmaster 4 Dr STD Sedan

    -

    Shopping & Pricing

  • 1988 Buick Riviera 5 answers

    I have a 1988 buick riviera i bought off a family friend it only has 132xxx miles on it, my low oil pressure light came on and my dad told me to just keep adding oil (wrong as hell) my oil (5w-30...

    1988 Buick Riviera STD Coupe

    -

    Maintenance & Repair

  • Critical Safety Issue 92-99 Buick LeSabres-Please read 19 answers

    Please if you are driving a Buick LeSabre 92-99 have your subframe checked. Mine just dropped. The back 4 bolts released. The subframe collars that house the bushing were rusted and gave way. This can...

    Buick LeSabre

    -

    Maintenance & Repair

  • 2002 Buick regal is blowing cold air fron the heater 3 answers

    Cold temp is not overheating, blower is working, 1 hose coming through the fire wall is hot one is cold after car is left running for awhile, no wet floor on passengers side, and no smell. ???????????...

    2002 Buick Regal LS

    -

    Maintenance & Repair

  • 1998 Buick Park Avenue Ultra --- Hard Shifting (at times) 11 answers

    We have a 1998 Buick Park Avenue Ultra. Periodically (as in not all the time) the car shifts hard in first or second. Usually it does not happen. It is not an everyday thing or even an every week...

    1998 Buick Park Avenue 4 Dr Ultra Supercharged Sedan

    -

    Maintenance & Repair

Roadmaster

Looking for a Used Roadmaster in your area?

CarGurus has 66 nationwide Roadmaster listings and the tools to find you a great deal.

ZIP:

Search Buick Roadmaster Questions

Buick Roadmaster Experts

#1 DanR63
DanR63
Reputation 420
#2 Rowefast
Rowefast
Reputation 270
#3 Tom Demyan
Tom Demyan
Reputation 220
View All

Related Models For Sale

Used Cadillac Eldorado
341 listings starting at $2,900
Used Chevrolet Impala
526 Great Deals out of 29,877 listings starting at $799
Used Cadillac DeVille
5 Great Deals out of 1,623 listings starting at $2,800
Used Lincoln Town Car
28 Great Deals out of 1,840 listings starting at $600
Used Chevrolet Corvette
98 Great Deals out of 20,456 listings starting at $3,495
Used Mercury Grand Marquis
25 Great Deals out of 1,849 listings starting at $1,600
Used Buick Park Avenue
3 Great Deals out of 427 listings starting at $2,900
Used Buick LeSabre
5 Great Deals out of 1,962 listings starting at $1,500
Used Ford Crown Victoria
13 Great Deals out of 1,055 listings starting at $2,900
Used Chevrolet Suburban
348 Great Deals out of 19,118 listings starting at $1,350
Used Buick Riviera
124 listings