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#17
04-06-2004, 03:41 PM
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Re: 95 Aurora acceleration troubles
Just wondering, I see 4 of the plug wires up front which seem VERY easy to get to. How easy is it to get to the 4 on the other side? Do I remove that cover in the middle (aurora V8)? Used to be pretty good doing tune-ups but with older cars and dont wanna screw up worse w/ this car, but I am having the SAME symptoms, hesitation w/ the occasional popping. Only had the car 4days so maybe the previous owner used poor gas, I use 91 octane but dont know what she used. Could this also be catalytic converter issue???
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#18
04-06-2004, 06:33 PM
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Re: 95 Aurora acceleration troubles
The other four aren't terrible to get to, but you do have to remove the plastic engine cover, as well as the coil packs. It's not a job for the fat-fingered. Be sure to use only AC Delco plugs and wires. There's some debate as to whether the gap should be .05 or .06 - mine are gapped at .05 and the car seems to need to chug for awhile starting (yes, I've replaced the FPR, twice).
--Robert
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#19
04-07-2004, 12:02 AM
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Re: 95 Aurora acceleration troubles
As always, thanks alot Robert. Just to clarify the OBVIOUS engine cover is the gray part on top that has Aurora V8 on it right? I know, I know that was a idiotic question. Coil packs??? Dont wanna screw anything up. I have wires that say packard on them that are in the car now have you ever heard of these??? Pretty sure the lady used cheap gas, especially when I gave her a deposit! LOL, Anyway im gonna use some treatment on my next fillup. Which one do you recommend. Heres a part of an email I got today from previous owner when asked about her last tuneup!!!!
Hello -- good to hear that things are going well. As far as an overall tune-up ... I only took it in to get the oil changed and if I thought something felt wrong. I trusted my mechanic ... he only fixed what needed fixing. Ever since driving the car, I've known it to make a sound when I turn. Sorry I don't have any answers there. I turned in the "Transfer of Liability" form on Saturday. I'm pretty sure that's all I had to do ... please tell me if there's more!
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#20
04-07-2004, 02:21 AM
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Re: 95 Aurora acceleration troubles
Yes, the plastic gray "Aurora V8" is the engine cover.
If your wires say "Packard" on them, those are probably the original ones. Re: removing the coil packs, just be careful not to drop the bolts, and to note what wires plug in, where, and you'll be fine. I'd also suggest changing the Fuel Pressure Regulator as long as you have the engine cover off. Might also want to change the fuel filter as it doesn't sound like the owner did much for maintenance (supposed to be changed every 30k miles or two years, whatever happens first). Re: fuel system treatment, I've never used it (a buddy has a fuel injection cleaning kit - costs around $400, and the solution you run through it is $15 or so), but I understand that Techron is held in pretty high regard. Hope this helps, --Robert
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#22
04-08-2004, 04:21 PM
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Re: 95 Aurora acceleration troubles
Hey you guys! Lets get back to basics here. Does't this problem sound like like the notorious Fuel Pressure Regulator? You know - the part that fixes just about every performance problem we have.
I would check the FPR before ANYTHING! (I can't believe this thread is this long without mentioning the FPR)
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#25
04-08-2004, 07:10 PM
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Re: 95 Aurora acceleration troubles
Remove the engine cover. Look at the back right corner of the actual engine, where the fuel rail is (and begins feeding out to the injectors). You will see a small device that looks like an "oil can" - IIRC it has one external connection, and it screws down/is held on by a clip. This is your Fuel Pressure Regulator. This goes bad on virtually every Aurora. Hardtimer, I think you've got a '95, and the bad news is that this part is around $90-$100 for that model year. The one for my '98 was only $36.
I replaced mine a month ago as kind of preventative maintenance (actually, it was beginning to suffer hard starts). After the replacement, it got worse. I noted that the small O-ring on the new FPR was a bit bigger than the old one. After much consternation and swapping old FPR's and o-rings back and forth , I got a new O-ring kit that had the correctly-sized O-ring for my car, and now the new FPR is installed and the car is working great. --Robert
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#26
04-15-2004, 12:10 PM
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Re: 95 Aurora acceleration troubles
Robert ,had the coils and plugs changed. Runs great!!! Only the car idles slightly higher now and I dont like that. Other than that im happy. Did notice this morning a little bit of an unstable coast, I can sort of feel a bit of fluctuation in rpm. No hesitation or misfire anymore though and that makes me more than happy!!! I think i'll take your FPR advice this weekend and what do you think about coil packs???? BTW my old wires WERE bad!!! They had TAPE ON THEM!!!!!! WTF!!!!
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#27
04-16-2004, 07:22 AM
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Re: 95 Aurora acceleration troubles
Yes, its' possible that, if your car was run with really bad wires for a prolonged time, that one or more of the coil packs has gone bad. Suggest you get one replacement, mark it, install it, then try the car. If it still hesitates/stumbles, then swap it for the next one down the line and see if it makes a difference, et. al. Of course if more than one is bad...
Also may not be a bad idea to clean the throttle body (do NOT use carb cleaner, there is specialty throttle body cleaner available at any auto parts store for around $2/can) as well as the Idle Air valve. If both are carboned, this can be a problem. Either GM injectorguard or Chevron Techron fuel system cleaner may not be a bad move, either. You did change the fuel filter, right? Here's a tip for the FPR install... put a little oil around the small o-ring on the bottom, before twisting in the FPR. I had problems with my replacement FPR, which turned out that some idiot had put the wrong size O-ring on the FPR, causing it to tear/not to seal when the FPR was installed. This led to hard-start conditions (cranking for 4-5 seconds). I was able to buy a FPR parts kit for $9 and it was apparent to me when I put the new one on, that the one that came with the replacement FPR was about 2 sizes too big. The replacement one seemed bigger than the one that was on the car, but I attributed that to the original one being compressed from being in the car for 6+ years... Hope this helps, --Robert
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#28
04-22-2004, 02:14 PM
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Re: Re: 95 Aurora acceleration troubles
My 95 had the same problem as the original problem on this thread. Chugging and backfiring. New plugs and wires fixed it. Sad part is I had new plugs put in a couple of months prior when I had a starter replaced. I wish I had returned to the dealer when I noticed the first hint of a miss becasue the real culprit was a craked spark plug that had to have been craked when installed. When I complained to the service manager about it he discounted the repair by giving me 1 new plug!
I feel my car has fallen in love with the mechanic because today it in for a FPR and filter along with a new neutral switch, since when it would die due to lack of fuel you had to stop and put it in PARK. Kinda dangerous. I do hope the FRP and filter do the job because of course the fuel pump will be next. I will probably try that one myself. I do hate to have the dealer do the work becasue of the expense, but throwing parts at a problem can be expensive too. The folks on this are very very helpful. Quote:
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