1995 Oldmobile 88 Royale possible ECM issue - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-20-2013, 08:20 PM   #21
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OH!!! You have a 95!!!!! Somewhere near the battery, you should find a single wire(don't ask me the color) with a single spade connector on it. It'* similar to this...



Run a single wire from the POSITIVE side of the battery to that connector. This will bypass the entire fuel pump relay system and energize the pump. I use to do this all the time to get a little cup of gas. I'll dig in my FSM for the fuel pump wires...
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Old 03-20-2013, 08:54 PM   #22
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Old 03-21-2013, 04:06 AM   #23
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We pulled the tank tonight.
What we did was:
1) unhooked the fill tube from the body
2) unhooked the fill tube from the rubber fitting (be careful as they are connected)
3) Plugged the rubber fitting with a tin lid from some jar, and then we hose clamped it (we had half a tank of fuel
4) Drilled out the bolts for the gas tank straps (we will replace them with better bolts)
5) Got the rubber fill tube fitting past the E-brake cables (it was ugliness)
6) unhooked gas lines at the fuel filter
7) unplugged the electrical to the pump
We rocked it side to side towards the drivers side, and it pretty much slid right out
***We did not have to remove the exhaust or the heat shield (Thank god!)

Tomorrow I will be picking up all the parts I should need, and hopefully reinstalling to massive success.

I had a hell of a time finding basic information on this job, and what is the best way to attack it. Maybe people can chime in with tips to do it better, and the next guy in line will be helped .

Thank you to the people who have chimed in, and I will be sure to post my results, successful or otherwise.
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Old 03-21-2013, 04:09 AM   #24
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Note for step two.
What I meant to say is the fill tube and vent tube are joined on the pipe, as well as on the rubber fitting. If you twist on it to much, you may risk ripping it open.
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Old 03-21-2013, 07:17 AM   #25
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you want to make sure everything is absolutely sealed when you put it back, or you will get evap codes
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Old 03-21-2013, 04:04 PM   #26
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Thats the goal, and we will do our best. Thanks man.
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Old 03-22-2013, 02:13 PM   #27
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My 2 cents : I changed my fuel pump to a universal one "supposed" to be ok. It doesn't push enough volume and I can't floor the pedal, it just goes lean and cuts.

Make sur the psi and gpm are good, "high pressure, high volume" are not quantifiable.
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Old 03-22-2013, 03:59 PM   #28
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It'* fixed. No leaks that I can see, and 45psi at the rail.
What a ugly job though....
After sitting in the garage my passenger side blows cold air only, while drivers blows hot. I fiddled with it all the way to work, but with little success. The passenger controls were disabled, and the heat was maxxed with no AC on. Is it just a stuck flap in the heating system. It feels like its blowing in air from outside, as it is terribly cold here.
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Old 03-22-2013, 06:43 PM   #29
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What was fixed?
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Old 03-23-2013, 07:48 PM   #30
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The car. It was a bad fuel pump. Replaced that and the filter, and now its good to go.
Well, except for my climate control problem.... lol
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