Knocking Sound?

kind of above your left foot? There's only one plug that shape in the whole car... But you do have to make sure the thing is plugged in all the way... ?

Pick up some new wires before you troubleshoot much else.

yeah i will , its just mystifying why once i download the codes i get a connection lost message . alright thanks ill update tommarow

whit2285 wrote:

alright scanned today got a few codes but for some reasons i couldn't stay connected
1. P0102-Mass air flow low frequency
2.P0341-Camshaft Position sensor A circuit
3. P1573-PCM/EBTCM Serial data circuit

any thoughts

i researched ALOT............ on the P0341 for my troubles it turned out to be the camshaft position sensor wire going from the PCM to the ICM.............

this car is fing possessed ,went out to try toget live readings couldn't but i used the basic reader and cleared the codes just because. car started real hard but started a little rough idle then almost died out caught itself and ran good there was no more load knocking noise like i had before WTF

yeah its not light check

If I remember right.. wasn't there something you needed to setup before you could start scanning live data with it?

It's been a couple years..double check the instructions... I want to think I remember having to go back and reread them.

looks like it may have been bad plug wires

congrats on figuring it out, i still cant get my heep running

i was just stupid i didnt even think abut the wires

Glad I could help!

whit2285 wrote:

i was just stupid i didnt even think abut the wires

it happens to the best of us..

give credit where credit is due thanks derek

It only happens when I put into "DRIVE" or "REVERSE", while in "PARK" it puuuurs.
I even stopped at a local Chevrolet dealer and asked if one of the mechanics could come out and take a listen to it.
He even went in to grab his stethoscope to listen to it closer and he spent a good 30 min on it to come to no conclusion.
I'm hoping someone out there has had the same noise or has heard of it and might give me an idea.
The mechanic did say that it didn't sound like transmission troubles, which was the first thing to come to my mind since it only happens when it's in gear.

Let me know what you think.

Please give us more of a description. My first gut thought was lower end, but if the mechanic didn't think so.. then it'll be a tougher one to determine.

It is possible that your car ate a ricer and now you need to open the hood to let that hamster back out.

If it's just one clunk when you initially put it into gear, it might be worn out engine/transmission mounts.

It's actually a continuous sound, most noticeable when the car is stopped and in gear, like when stopped at a red light.
After I posted the question here, I told this to a buddy of mine and he suggested it could be worn out belts (which they are) or even one of the pulleys. and it's most noticeable when stopped and in gear because the RPM lowers at that point. Does any of this make any sense.
Anyways, I already have the belts to replace (1 Gatorback and 1 Gates) so I'll be doing that this weekend and get back with the results.

well i had a mazda b4000 pickup truck when i would stop it would get a horrible knocking sound when accelerated the noise would go away ,well after $3000.00 on a new transmission and court battles with Aamco i diagnosed the problem to be a alternator going bad. check the alt.

Could be something like a worn control arm bushing. Mine do that, plus I get an annoying vibration at a stoplight in gear. Plus a little clunk when I shift to reverse. Plus a little creak/squeak when I start from a stop...

I know my right two control arm bushings are gone, one of them is pretty bad. I have new control arms to go in next weekend, hopefully that'll take care of all my weird creaks and groans.

whit2285 wrote:

i diagnosed the problem to be a alternator going bad. check the alt.

Thanks, I'll check that out.

can you tell if the car has a KR. while you are driving or when it is running?

robertwolf86 wrote:

can you tell if the car has a KR. while you are driving or when it is running?

MOST OF THE TIME you can't HEAR or FEEL Knock Retard dude.... but you can buy a scanner and scan for KR

Ohh, and it wasn't the belts by the way. I switched out both belts this past weekend and the sound is still there. Next step is to replace some of the pulley's (which ever ones I can find)
Any idea where I can get info on size or numbers for the pulleys? This is something I've never had to do to any of my previous cars so I'm kind of in the dark.
I thought I could just buy a kit, but there doesn't seem to be one for our cars.

Thanks

I'd guess....

a. Harmonic balancer or idler is shot
b. Torque converter bolts loose
c. Damaged engine/tranny mounts

All 3 make one hell of a knocking rattling noise, usually under load.
just guess' by the way.