go look at the TSBs of ...

[Dexter]

...the 87 RX-7

check all those TSBs.....

they have about 5 or 6 on items we here are so familiar with :
Hesitation, Buck and Stumble during Acceleration
Hesitation at ~3800 RPMs

etc etc

*shrugs* dont flame, i just posted this because i am researching a car for my brother and i just thought i would mention. *shrugs*

 

[boostisgood]

Very interesting find, put a link up Dex. Im gonna make my "contacts" at Callaway and SCC aware of this

 

[Dexter]

http://www.atlantarx7.com/secondgenfaqs.html

hey theres the link, sorry that took so long, i had the link saved at work, and not at home and couldnt remember it

 

[N1XRR]

The 3800rpm hesitation/bucking/stumbling is caused by a poor grounding system in the RX7's. I had it pretty bad, then I re-grounded my car and it worked perfect.

 

[DaKidd]

The 3800rpm hesitation/bucking/stumbling is caused by a poor grounding system in the RX7's. I had it pretty bad, then I re-grounded my car and it worked perfect.

Did u have to figure that out on ur own, or did mazda actualy do the leg work on this one? wonder if thats the deal with ours? prob. not.... sighhhh....

 

[boostisgood]

I dunno man. My lights dim like a blonde at school, when my bass hits. They also dim when I turn on the interior light, when I turn on my A/C, or just about run any other electical component in the damn car.

Ill try and make a grounding kit for mine, and see what it does. If it works, Imma in business to make, and sell the hother cluckers

 

[N1XRR]

The RX7 owners fixed it on their own. It really only became a problem after about 7-10 years as the wiring started to degrade. This has been proven not to be the case with our MSP's, as it is a fuel problem. The RX7's have also a similar problems, but its not the same cause.

In the RX7's there is staged injection as well as staged ignition. We will ignore the staged ignition as it is not important. At approx. One pair of injectors are working all the time in the RX7's. No matter where or when, there are 2 injectors always working. At about 3800rpms the 2nd set of injectors start working. Too much fuel? No, its the added draw of current that causes the hesitation. It aparently takes a lot to turn them on, but not much current to keep them going, kinda like a flouresent light.