95 Aurora acceleration troubles

[chellep73]

I have a 95 Aurora that is having some trouble. I have some terrible hesitation during acceleration. Mainly over 40mph but some slight hesitation under 40mph. During that I also will get occasionaly pops...don't know what else to call it. My mechanic told me to try fuel injector cleaner Chevron with Techron, which I have and don't seem to see any difference....says try another treatment but I'm starting to really have my doubts here.
Any ideas or someone have any similar troubles??
I did have a "tune-up" 13 months ago with new plugs, new fuel filter and so forth. I had some slight hesitation prior to the "tune-up" but nothing this horrid and it went away completely after the service.
Thanks for any ideas

[oldsdad]

Did they replace the plugs and wires with AC Delco makes a big difference in these cars.

[chellep73]

Yes they were all AC Delco parts.....I got the shock of my life when I saw the price LOL
I think they said the plugs would still be under warranty but they don't seem to think that those could have gone bad.
The car isn't starting well either.....when cold it fires right up but after that it takes a little bit to fire up.
I'm going to put another treatment of the fuel injector cleaner with a tank of Mobil premium gas but I'm guessing it is going to be a waste of time.

[oldsdad]

Some have found pin holes in their fuel rail check to see if you can smell gas when warm or check fuel pressure, EGR valve stuck open causes problems when warm do you get a SES light.The hard start problem is covered in a couple of different threads on the fourm you might want to check back through them for more ideas.

[chellep73]

I don't smell any fuel at all. I had paid attention to that since my mechanic warned me of that common problem with the Auroras and I have had no smell of fuel so I'm guessing? not the fuel rail but who knows at this point.
As far as any lights, not a think...no check engine light has been on at all and lists all monitered systems ok......
I am going to go back thru all the threads that I had read since maybe I have more than one problem going on here.
Thanks for the input, I do appreciate the ideas as I have come to a brick wall until I get thru this next treatment and I end up probably bringing it in since I have a feeling it will be beyond my chance of repair

[KillerKeller_jr]

I have the same troubles with my 95 Aurora, I think when it warms up in Nebraska, I will do a small overhall to see if that fixes it. Although mine does not do it all of the time. Darndest thing, oh well, like my grandpa says, cars will always keep you broke!!!! Good luck in fixing your problem....

[dsatt12]

If you've got a mechanic you trust pretty well, let them hook up a scan tool to it while they drive it around. The better ones (like a mechanic would likely have) let them monitor and log all the sensors and such. They might be able to pick up something that isn't enough to trigger a SES light.

On the other hand, the first car I bought when I turned 16 was an '85 Cavalier that just had the wire harness 'mysteriously' work its way loose off the SES light in the dash. Too bad it's a 95 or one of the auto parts store could pull any codes for free just in case.

Good luck with that and let us know if you figure anything out.

[chellep73]

Thank you....I think I'm going to need some luck LOL
I'm going to call my mechanic first thing Monday to see when they will be able to look at it, especially after I went out this evening and it started idling a little rough UGH
It is freezing cold here in Michigan, currently in the single digits so that doesn't help it much....or me for that matter LOL
I have it going in to replace the shocks/struts and then some minor body work on the rear end for a recent hit and run accident and so add this to the list and I think I'm going to be without my car for awhile
Thanks again and I will keep you posted on what I find out with this problem.

[Indy8]

Techron is really good stuff. It will only make an already smooth running engine super smooth. How many miles in those 13 months? Under what conditions and temperatures? What grade of fuel and how often do you change brands of fuel? All these factor in to plug life. I would bet it's time for new plugs again. Wires are probably fine. Maybe have fuel pressure checked too.

[chellep73]

My thoughts have been towards the plugs so I have a feeling you are right on that was thinking maybe bad plugs or arcing in the wires....just a little frustrated if that is the case when my mechanic told me they would last nearly the life of the car with the ones he put in. Didn't understand how that would be possible but I did hope for longer than this.
I think as far as mileage in the 13 months since I put on roughly 18-20K and as far as fuel I usually use midgrade but I saw that premium is recommended so I started to switch to that.
If it is the plugs again I am not looking forward to that bill...last time it was approx $400
I'll let you know what I find out - which I hope is soon....seems like winter hits here and the mechanics are swamped!

[oldsdad]

Plugs and Wires should be a do it yourself job if at all inclined that way its only about $160 ouch $400 would hurt.

[KillerKeller_jr]

Sound like you got riped off at $400 dollars you could do it yourself for about $150-$200. Its pretty simple too, I've replaces spark plugs and wires for a lot of my friends, I just have them buy me a couple of beers for repayment. Good luck in what ever you do.

[1995oldsaurora]

i would look along the lines of a fuel problem.i have a 1995 aurora which was having similar problems.start of with a new fuel filter.if no results try a new fuel presure regulator and last a new fuel pump.after replacing the fuel pump,my vehicle ran like new again.since you just had the car tuned up only 13 months ago,dosn't sound like a plug/wire problem.let me know how you make out.

[Indy8]

Yeah, you can have your fuel pressure checked quick and cheap at any shop.

[gates455cutlass]

Look before you do anything else, try replacing the coils...Mine did exactly what yours did. I replaced the wires with aftermarket and bosch platnium plugs. Still had the problem. Replaced the coils and have had wonderful p[erformance since then. The coils were about 20 bucks apeice. the wires I think were like $50 and the plugs were 1.99 each. Mine was doing exactly what yours is.Good luck!