Couple of quick ? I need answered if possible - 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 04-14-2008, 07:50 PM   #1
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Default Couple of quick ? I need answered if possible

Alright guys I have a 95 SE and had a new motor put in a couple of days ago from a 96 Park Avenue. Got it back and been driving it for a couple of days to see if some of the kinks would come out and have found a few problems. First of my check engine light will not go off. I don't know if it has to be reprogrammed since I got a new motor or if it could be caused from the problem I've been having. When I start my car still in idle it feels like a slight rumble coming from the engine but doesn't do it every time. It also does this often when coming to a complete stop (stop signs and stop lights) and my gas pedal becomes slightly stuck and needs a nice push to get unstuck. Any suggestions guys would be greatly appreciated.
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Old 04-14-2008, 07:55 PM   #2
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i would suggest going over the vacuum lines.

how many miles are on the p/a engine? do you know if the upper intake has been changed on the new engine?
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Old 04-14-2008, 07:57 PM   #3
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We're going to need codes pulled for the check engine light...unfortunately I believe Autozone (for example) only loans out OBD-II code readers. Anyone know more about OBD-I that can help?

As to the gas pedal...maybe a kink in the cable?

Say, who installed the engine? I wonder if you've got all the right sensors since a '96 would be an OBD-II (I'd have to do some checking myself to see what exactly changed between '95 and '96)
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Old 04-15-2008, 12:17 AM   #4
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on most obd I systems you can jump the diagnostic port to ground causing the fans to turn on and the CEL to illuminate on the dash it will then start and sequence of flashes. but i know that GM test piloted the OBD II systems and select 94 and 95 vehicles had issues with OBD I codes but OBD II connector or vise-versa this is how if its up to 93 may work for 95 may not http://www.bonnevilleclub.com/forum/...d+i+diagnostic
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Old 04-15-2008, 12:57 AM   #5
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The previous owner'* were an older couple that took good care of the car and had a little over 100,000. My mechanic test drove it and didn't find anything wrong but I will be taking it back for him to look at. I'll suggest the vacuum lines

Yeah when I took it to Autozone they had no luck reading the codes so I'm going to have to find somewhere that has the right reader for it. Gotta wait til Friday though

I was told by someone else it could be a cable but I checked and it seemed to be good. So my guess was the sensor too since it'* an on/off situation with the rumble and the sticking off the pedal. Hopefully nothing too serious cause I'm running out of patience...
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Old 04-15-2008, 07:33 AM   #6
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Quote:
Originally Posted by tan96ssei
on most obd I systems you can jump the diagnostic port to ground causing the fans to turn on and the CEL to illuminate on the dash it will then start and sequence of flashes. but i know that GM test piloted the OBD II systems and select 94 and 95 vehicles had issues with OBD I codes but OBD II connector or vise-versa this is how if its up to 93 may work for 95 may not http://www.bonnevilleclub.com/forum/...d+i+diagnostic
unfortunately that won't work for him. 93 was the last year you can use the paper clip trick.

you may find a member in the area that has a scanner. anybody near him?
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Old 04-15-2008, 01:47 PM   #7
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OK, here'* a potential concern on your rough running.

According to Rock Auto, early '96 Park Ave and all '95 Bonneville SE share the same MAF sensor:
ACDELCO Part # 2131621 {replaces 213-269}
SENSOR,MASS AIRFLOW 1ST DESIGN; 3 SCREW ATTACH

But later '96 Park has an updated design MAF:
ACDELCO Part # 2134338 {#19179716}
SENSOR,MASS AIRFLOW 2ND DESIGN; 2 SCREW ATTACH

Perhaps the '96 PA engine is of later build, and retained it'* TB and later design MAF sensor. The plugs are likely the same, but the programming in the '95 Bonnie PCM would not be right for the newer sensor.

Johnboy9, check the MAF sensor installed in the top of your TB and see if it'* attached with 3 screws or 2 screws. Maybe post a few pics of it if you are unsure.

If this does turn out to be the case, do you still have the old engine (or at least the TB and sensors)?
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Old 04-15-2008, 02:06 PM   #8
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Regarding the sticking throttle cable - Check the throttle cable and the way it is routed. Remove the cable end from the throttle plate fitting and slide the cable end back and forth within the housing feeling for smooth operation. Do this with the housing bent where it normally would be. If that is all good, maybe you have a buildup of carbon in the throttle body and on the throttle plate that is causing it to stick when it closes. It sounds like you will be changing this to a '95 TB and MAF anyway. You will want to clean the new throttle body and the MAF before you install it.
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