My name is Connor and i moderate the "tires and wheels forum". A friend of mine has a stock 94 gen 3. She told me that when she shift's into 3rd she gets a buckng between 2500 and 2900 rpm. She has had all the vacuum lines replaced and it hasn't helped. Is there anything specifically that could cause this. The Mazda dealership in her area can't diagnosis the problem and she is tired of having people that don't have a clue playing with her car.

Any help would be appreciated.

 

how bad is the bucking? is it bucking or more like surging? does it happen in ever gear or only in 3rd gear between the said RPM range?

 

http://scuderiaciriani.com/rx7/3k_hesitation.html

 

^ Werd

P.S. Mahjik, I just noticed your at 10,000 posts. I could have sworn you were at like 8,000 like last week. Someone needs to lay off the computer (j/k). Good stuff.

 

conor - check your emails. i sent you one a while back about the kosei wheels. waiting to hear back.

 

Yea, my wife tells me the same thing, everyday.

 

Don't know if it's the infamous "3K" rx7 hesitation, but if so it can be solved with another ground from the battery.

 

Might be solved. Maybe, if you're lucky.

Dave

 

I had the same problem when I ran the A/C or had my lights on. Check all the grounding points. And add another ground strap. You can get a free one from Pettit.

 

What's she doing in third gear below 3k anyway ?

 

^ ha ha good point.

 

Keeping ahead of the Civics.

 

mmmmm...Women that drive FDs...

 

she might wanna double check her injectors, perhaps secondaries are not comming online properly? what boost is she at when it happens? what ecu is she running? other mods on her car?

 

I am not sure how bad the "bucking" is. The car is a few hundred miles away so i am useing her description. As i recall she said once she gets above 32- 3500 rpm it smooths out. A tech that she uses in her local area had mentioned he has heard of grounding problems but she is hesitant about letting this guy experiment with her car.

 

The car is completely stock other than stock replacement parts. The vaccum hoses have been completely replaced to eliminate the chances of leaks. I thought that it sounded like an fuel injection/vacuum problem from how she desribed it over the phone.

 

I go throught 50-60 emails a day plus covering 5 web forums. If i recieved it before last friday i replied to it. If you didn't recieve a response then i probably never got it, If you send it to me again i will look into it. If you are looking for a faster response just give me a call i can give you the information over the phone.