might have an issue could use some help

**slpdablueZ28** · 02-02-2010, 04:52 AM

2002 a4 with around 58k miles on it now. I've been feeling and hearing some weird things when I accelerate. Happens when I start giving it more gas. Its sound like a slight thunk/pop and I can feel it in the gas pedal through the car I guess. I think its come either from under or behind me. When I accelerate it feels like the car is shivering, and it does feel like it normally does but a bit laggy. Any ideas mighty masters of the ls1?

**mark21742** · 02-02-2010, 08:04 AM

Check your motor and tranny mounts to see if they are worn or torn... Sounds like its time for a head/cam swap and upgraded tranny (ok excuses)lol

**Knight** · 02-02-2010, 08:20 AM

I agree with mark21742. If those check ok could also be a t/c problem or driveshaft issue though not as likely.

**Mr. Luos** · 02-02-2010, 08:26 AM

SLP MAF?

It is pinging.

**Spikito** · 02-02-2010, 09:30 AM

My first guess would be motor mounts and trans mount.

I wouldnt rule out a bad plug either.

**0rion** · 02-02-2010, 09:36 AM

Originally Posted by slpdablueZ28

2002 a4 with around 58k miles on it now. I've been feeling and hearing some weird things when I accelerate. Happens when I start giving it more gas. Its sound like a slight thunk/pop and I can feel it in the gas pedal through the car I guess. I think its come either from under or behind me. When I accelerate it feels like the car is shivering, and it does feel like it normally does but a bit laggy. Any ideas mighty masters of the ls1?

that description is kinda all over the place really. Does it sound like something hitting the underside of the car? That could be a busted tranny mount. The shivering sounds to me like it might be missing? It also sounds like it could be a u-joint possibly??

**slpdablueZ28** · 02-02-2010, 10:32 AM

Sorry about the odd description but I don't know how else to explain it. It happens when I give it gas at speed and sometimes from a stop. No pinging if u guys are talking about a noise. It sounds kinda like thunks/pops and I can feel it through the gas pedal

**slpdablueZ28** · 02-02-2010, 10:35 AM

And it doesn't feel like something is hitting under it. It feels like something in the mechancs. Either from the rear end or maybe transmission cause it feels like its slipping in the shifts

**mark21742** · 02-02-2010, 12:03 PM

Originally Posted by slpdablueZ28

And it doesn't feel like something is hitting under it. It feels like something in the mechancs. Either from the rear end or maybe transmission cause it feels like its slipping in the shifts

Do you have a higher stall and tranny cooler?
How does your tranny fluid look/smell, clean pink, or burnt brown?

**slpdablueZ28** · 02-02-2010, 01:56 PM

Originally Posted by mark21742

Do you have a higher stall and tranny cooler?
How does your tranny fluid look/smell, clean pink, or burnt brown?

No that's still stock. I haven't checked the fluid yet but ill get on that

**0rion** · 02-02-2010, 03:22 PM

Originally Posted by Mr. Luos

SLP MAF?

It is pinging.

maybe Luos is on to something with the MAF.....maybe it's lean and backfiring? Have your stock MAF to put back in there to rule out the slp maf?

**slpdablueZ28** · 02-02-2010, 04:29 PM

Originally Posted by 0rion

maybe Luos is on to something with the MAF.....maybe it's lean and backfiring? Have your stock MAF to put back in there to rule out the slp maf?

I've had it tuned so that doesn't happen much. Its not backfire though

**slpdablueZ28** · 02-03-2010, 11:46 AM

I checked the trans fluid it was pink but the dipstick was a little dirty and there was more fluid than there should be. Is that a problem?

**sunsetorangess** · 02-03-2010, 11:54 AM

Too much fluid is just as bad as too little fluid. Did you let it warm up to Op temp befor checking the fluid level?
I would lean towards Tranny mount or U Joint in at the rear..
Might wanna jack it up and take a look.
J

**slpdablueZ28** · 02-03-2010, 01:50 PM

It was after I parked the car. But hve never put more fluid in

**garygnu65** · 02-03-2010, 02:53 PM

also check for too play with your ring and pinion.and your torque arm is not lose.

**slpdablueZ28** · 02-03-2010, 05:40 PM

hard part is getting under the car to check this stuff. i neither have a decent lift, nor a good place to do all this checking other than the street. i wish it would just throw a code to save me hassle but its really annoying

**gnomee** · 02-03-2010, 05:42 PM

+1 for the tranny mount. Sucks you don't have a jack though, just go pick one up. $69 or so at your local parts store.

**slpdablueZ28** · 02-03-2010, 06:30 PM

yeah i really should. but how would the trans mount be causing this noise. like it feels like theres something messed up while its shifting

**gnomee** · 02-03-2010, 07:48 PM

Well if it is bad enough your drive shaft is not aligned properly and your u-joints are having additional / akward stress put on them.

Also if it is bad enough the drive shaft could be grinding/touching the factory safetly loop (its not aloop but it serves the same purpose

)