I got lucky, and got my Rx7 for free. It was my Dad's car , and he gave it to me. I got the car with 254000 miles, with 52000 on the rebuilt engine. Anything that broke he said he would pay for. So far I have needed:

A new oil pan (hole).
The gas tank had a hole in it, got a new one.
A dent, that my mom made with her Durango (she paid for that)
An alternator (it lasted 14 years)
Now I need a new tranny, it just broke yesterday.(that lasted 258K miles !)
And I need secondary fuel injection to work again (it sucks shifting at 3800 all the time).


Mike
--------------------
'86 NA
no mods

 

What do you mean by this? What happens when the secondaries kick in? Hesitation?

 

I can go full throttle till about 3800. Then I have to back of to about 1/4 throttle to get the RPM's to continue going up, without the car "bogging-over" on me. After the 4000 mark, I can slowly re-apply the gas, up till about 3/4 all the way to the red-line. But without those secondaries, those Civics are mean . This happens through every gear. (though I do not know about 5th, after 5500 RPM in fifth your going FAST!)

Mike
---------------
'86 NA
no mods

 

And I cannot figure out if it is the injector(s) itself, or the just the chip. That's the question.

Mike
--------------------------
'86 NA
no mods

 

Do a search on the 3800 RPM stumble or something like that...Its a VERY common problem.

 

Ya what he said. Thats what I was trying to get at. You have the 3800rpm hesitation. Just do a search and its a fairly easy fix.

 

I think he is saying that the he thinks the secondaries are not working at all. Or that is his deduction of it. Not just the 3800 hesitation.

Replace the Fuel Filter and see if that solves the problem.

 

Well, yes you are right. But the solution to the stumble and them not working at all may be very similar...

Like I said earlier, I would check the connectors first.

 

Where did you say this earlier?

 

Trust me, the secondaries ARE NOT WORKING. I know what the 3800 RPM hesitation is, and this ISN'T it. This is major, like the car won't accelerat AT ALL after 3800, unless I give it 1/4 throttle maybe a little less. This is why I can not figure out if it is the chip, or the injectors itself.

Mike
-----------------
'86 NA
no mods

 

And the fuel filter was replaced LESS than 4000 miles ago.

 

I doubt its the ECU. Pop off your secondary injectors and have them cleaned & blue printed, should cost less than $25 per injector ... and you can usally find a place local that does them. Even if thats not the problem its a good thing to have done anyways ... and its a cheap bit of trouble shooting.

 

It was in a different thread that NA86RULZ posted about the same problem...

 

Funny how you can achieve 8 mph higher than a brand new 86 NA, with a worn engine and non-functioning secondaries.
There isn't any way you're going 136 mph without mods and WOT.

 

Like I said, I had the same problem...It was ony ONE of the secondaries that wasnt working. Still felt like I hit a BRICK WALL above 3800. You can pull and test the injectors easy as hell. All you need is some test leads, and an extra car battery. You can manually test the injectors to see if they are functioning.

There is a write up about it some where...

I cant find it...Basically I just pulled the injectors, and made small spade connectors to fit on them (polarity isnt an issue). Then i just tapped the wires against a 12v source while I ran carb cleaner through them.. You can use this method just to see if your injectors are working/clogged.

Rat

 

The post I read said to use a 1.5V battery and to cycle the voltage on and off. Hooking up a car battery seems like a good way to destroy the injector.

 

Actually, its quite safe as long as you use short jolts of power. I had C-clamped the injector to a bucket, and was running injector cleaner through it by just tapping one of the leads against the battery for VERY SHORT periods of time. But if using a car battery makes you nervous, use a different power supply....

Rat

 

I got past 135mph in my old 88 GXL. It had the stock rims and stock size tires as well. I remember looking at the speedo and I was at 135 and still climbing slowly, held the pedal down for like 10 more seconds or so and then let off.

 

Funny how you can achieve 8 mph higher than a brand new 86 NA, with a worn engine and non-functioning secondaries.
There isn't any way you're going 136 mph without mods and WOT.


^^^Where the hell did that come from? No one ever said anything about any speed. Though, I myself have done 130 in my 86 NA, now that you mention it.

Anyway, this is about INJECTORS, not speeds

Mike
--------------------
'86 NA
no mods

 

yeah i had the same thing happen to me. I took a look at them and noticed that the injectors werent connected properly..check it out its a easy fix if thats the problem....
LATES DAVE

 

Yeah, I've done 135 in my car... that was random as hell...I thought we were talking about injectors??

 

Not trying to stay off topic, but the "factory spec top speeds" are crap they are gross understatments in most cases. I know first hand that a 88 vert can go past 124 quite easy. COMPLETLY STOCK

 

5500 rpm in 5th gear is 136 mph.
You quoted 5500 rpm in fifth.
without secondaries, you cannot do that.

My argument was not the top speed, it was doing it in a car that was completely stock, doing it at 3/4 throttle, and without secondary injectors.
Not gonna happen. Don't even try to argue it.

 

This thread is so hijacked.....

 

I agree its possible, I did around that with my old 88 NA, completely stock with factory rebuild.

But its NOT gonna happen completely stock on an engine that worn without secondary injectors.

And why can't you guys not figure out that you can calculate top speed from gear and RPM?