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Post by jmurdr1 on Mar 19, 2016 22:01:55 GMT -6
I have a 99 aurora 4.0 with roughly 190,000 miles on it and started having intermittent power losses and misses. She will sputter for a short while after starting down the road even after warm up and suddenly regain all the power after about a quarter mile down the road. I checked the codes and I had ibe thrown for a ignition issue and one for a fuel pump issue...I started to do the tune up myself then I realized how in the hell do I get to the back spark plugs? It was kinda overwhelming to think about attempting it myself ...I'm wondering how much a mechanic would charge a man for on a tune up on this car? Or maybe some good advise on how to go about it myself
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Tune up
Mar 19, 2016 22:14:00 GMT -6
Post by sall on Mar 19, 2016 22:14:00 GMT -6
The rear bank is pretty easy once you remove the coil packs/ignition control module. The two rear 10mm nuts can be a bit a tricky your first time around. Also an extended spark plug sockets is nice to use on these. Use Delco 41-950, don't cheap out on the plugs.
FWIW about ten years ago I was quoted $200 for plugs/wires not including parts. Pass!
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tigger
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Tune up
Mar 21, 2016 22:37:49 GMT -6
Post by tigger on Mar 21, 2016 22:37:49 GMT -6
...about ten years ago I was quoted $200 for plugs/wires not including parts. Pass! Haha, same here, $400+ quote for plugs/boots/springs/labor back when she was pushing 100K. I passed on that, spent ~$75 on parts and did it myself... And X2 on the extended socket, I wasted about 30 minutes digging out the regular plug socket on the first plug I changed, lol!
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blu52
Aurora Newbie
Posts: 13
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Tune up
Apr 8, 2016 19:27:45 GMT -6
Post by blu52 on Apr 8, 2016 19:27:45 GMT -6
If you haven't done so already, or don't know when it was replaced for sure I'd start by changing the fuel filter which is located on the driver side near the rear axle (very close to the front of the fuel tank). Sometimes an old filter will get wet and collapse blocking fuel flow. Later it will spring back giving an intermittent problem. In any case a good tune up deserves a fresh filter and you might just swat the fly in your soup with something that inexpensive and simple. YouTube has a video of how to do it (Olds intrigue but it's close to the same ) HERE >https://www.youtube.com/watch?v=89ahbTLP1NA I'd have a look first if you take it on.
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Post by jmurdr1 on Apr 16, 2016 7:12:39 GMT -6
I had the tune up done...it is running smoother but still having a hesitation right after start up...going to change the fuel filter today after lunch.
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blu52
Aurora Newbie
Posts: 13
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Tune up
Apr 16, 2016 8:47:28 GMT -6
Post by blu52 on Apr 16, 2016 8:47:28 GMT -6
I you get good results (or not) please keep us up to speed. This is how we learn. Thanks for your feedback.
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Post by jmurdr1 on Apr 16, 2016 17:33:38 GMT -6
Well I changed out the fuel filter and nothing has really changed the car will still spit and sputter with a dramatic loss of power until I drive it for about a quarter mile then it straightens out and runs fine until I park it and turn it off. After I restart it the bogs down like before...I'm thinking maybe a fuel pump issue. Any input would be greatly appreciated
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Post by jmurdr1 on Apr 16, 2016 20:54:27 GMT -6
I the codes read again today after a service engine soon light came on and I got a code for secondary circuit low voltage for the fuel pump...
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Post by jmurdr1 on Apr 16, 2016 21:20:09 GMT -6
Should I go ahead and replace it?
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Post by jmurdr1 on Apr 18, 2016 0:09:31 GMT -6
I did it anyways
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blu52
Aurora Newbie
Posts: 13
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Tune up
Apr 26, 2016 10:54:57 GMT -6
Post by blu52 on Apr 26, 2016 10:54:57 GMT -6
Hi, I'm still following your results as it could be useful to us all, especially if it's not an easy fix, so far it has not. So, how's your Aurora doing now, did she smooth out?
Sorry the fuel filter didn't do it for you but now, at least, you are certain that is NOT the problem and it IS a tune up item anyway. I understand that replacing the fuel pump is NOT easy as it is in the fuel tank. Am I wrong about that? Don't want to spread misinformation. . . Also I understand that there is a backup system for it driven by the oil pump. That's pretty cool and weird at the same time. I'm very intersted to know if you've solved the problem by following the codes given.
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RCA1186
Administrator
Rob
Go Pack Go!
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Tune up
Apr 26, 2016 12:43:22 GMT -6
Post by RCA1186 on Apr 26, 2016 12:43:22 GMT -6
Hi, I'm still following your results as it could be useful to us all, especially if it's not an easy fix, so far it has not. So, how's your Aurora doing now, did she smooth out? Sorry the fuel filter didn't do it for you but now, at least, you are certain that is NOT the problem and it IS a tune up item anyway. I understand that replacing the fuel pump is NOT easy as it is in the fuel tank. Am I wrong about that? Don't want to spread misinformation. . . Also I understand that there is a backup system for it driven by the oil pump. That's pretty cool and weird at the same time. I'm very intersted to know if you've solved the problem by following the codes given. For a pump change, follow the videos in this link for changing the fuel pump sending unit. There's access to the pump through the trunk so it is a lot easier than most cars. It's essentially the same procedure as fixing the sending unit (what is shown in the video) except instead of taking the arm float off the pump you'll just replace the pump and float as one unit. It's pretty straightforward if your lock ring isn't badly corroded. Not so sure what you mean about a backup driven by the oil pump.
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Tune up
Mar 17, 2018 21:46:32 GMT -6
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Post by nikkirae on Mar 17, 2018 21:46:32 GMT -6
Most recently I found out that my sputter and loss of power was due to air filter being out of place, causing dirt and everything else to get sucked up through throttle body, past MAF and into engine... so a little MAF spray cleaner, and of course repositioning the air filter got her running again, just need oil change and new plugs n wires. Hopefully yours is back up and running by now.
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Tune up
Mar 19, 2018 15:06:47 GMT -6
Post by derkach99 on Mar 19, 2018 15:06:47 GMT -6
Most recently I found out that my sputter and loss of power was due to air filter being out of place, causing dirt and everything else to get sucked up through throttle body, past MAF and into engine... so a little MAF spray cleaner, and of course repositioning the air filter got her running again, just need oil change and new plugs n wires. Hopefully yours is back up and running by now. When you cleaned your throttle body and MAF would you have anything to suggest? I am about to clean my throttle body and MAF shortly. I was thinking of using brake cleaner but i think i am going to use throttle body cleaner and MAF cleaner.
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tigger
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Tune up
Mar 19, 2018 22:12:18 GMT -6
Post by tigger on Mar 19, 2018 22:12:18 GMT -6
I was thinking of using brake cleaner but i think i am going to use throttle body cleaner and MAF cleaner. Good choice. Parts cleaner, brake cleaner, carb & choke cleaner, etc. can cause damage to the MAF and TB. Pretty much need to stay away from anything containing MEK (Methyl Ethyl Ketone)... FWIW, you'll get much better results if you take the time to remove the TB for cleaning. It's not as difficult as you might think.
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Tune up
Mar 20, 2018 21:44:41 GMT -6
Post by derkach99 on Mar 20, 2018 21:44:41 GMT -6
I was thinking of using brake cleaner but i think i am going to use throttle body cleaner and MAF cleaner. Good choice. Parts cleaner, brake cleaner, carb & choke cleaner, etc. can cause damage to the MAF and TB. Pretty much need to stay away from anything containing MEK (Methyl Ethyl Ketone)... FWIW, you'll get much better results if you take the time to remove the TB for cleaning. It's not as difficult as you might think. That's the plan I am getting a fel pro TB gasket with my next rock auto order $3 with no additional shipping! I am also changing the air filter and i am following a write up on cleaning it posted on the forums here.
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Tune up
Apr 20, 2018 4:03:45 GMT -6
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Post by nikkirae on Apr 20, 2018 4:03:45 GMT -6
Started out with throttle body cleaner. Needed a second can and got MAF cleaner which I thought did have a more noticeable effect on getting it to stop sputtering. Can't say I remember the brand I used though.
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Tune up
Jun 1, 2018 12:33:38 GMT -6
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Post by aurora57k on Jun 1, 2018 12:33:38 GMT -6
I just went through a very similar problem with my 98. Usually it would start okay but by the time I was out of the driveway, usually when I put it in gear it's when I would notice it start missing and sputtering. Some days it would smooth out someday that wasn't. Anyways long story short, since the plugs are new, I changed all my coils and my plug wires. hasn't missed a bit since. I had a full set from my 97 so it saved some diagnostic time to change them all. Hope that helps as I had already cleaned everything and checked the gaskets, also therr was mention of an ignition code if I remember correctly.
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