2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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I am a newb have an exhaust ?

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Old 06-09-07, 12:27 AM
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are you talkin about buying the whole True dual set up cuz i dont see just the header on that site ?
Old 06-09-07, 12:41 AM
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its on there trust.
true duals wouldnt be a bad set up either.
Old 06-09-07, 12:49 AM
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well thats gonna cost a penny or two
Old 06-09-07, 01:31 AM
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Originally Posted by Hecubus84
Surely you can see that someone could infer that you thought it unnecessary to replace the o2 sensor from these posts.
If I didn't think it was worth fixing I would've said exactly that. I was referring specifially to his problem not being able to be caused by or fixed by the O2 sensor. This was pretty clear I thought...
Old 06-09-07, 01:20 PM
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Would it be a good idea to buy a new ECU cuz my overhead light doesnt always come on and my dash clock never works like theres a short somewhere or somthing ?
Old 06-09-07, 07:56 PM
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Question

Originally Posted by NZConvertible
Because the stock EFI system cannot compensate for the changes, so the engine will simply run very rich. This has nothing to do with the rotary, it applies to any engine.

By increasing airflow, i.e. intake, exhaust, porting, etc. Up to certain point the EFI system will easily compensate for increased airflow, and NA's don't reach that limit without major mods.
What if i gave it a hotter spark .
Old 06-09-07, 08:20 PM
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Originally Posted by Toxindude
Would it be a good idea to buy a new ECU cuz my overhead light doesnt always come on and my dash clock never works like theres a short somewhere or somthing ?
The ECU controls the engine, nothing else.

Have you checked the bulb in the interior light? Have you checked the 7.5A ROOM fuse?

Search the 2nd Gen section for "cold solder" and you'll find lots of info on problems with the warning light and clock cluster and how to fix them.

What if i gave it a hotter spark .
That won't achieve anything.

If you want more power, you need more airflow. You don't need to worry about anything else yet.
Old 06-09-07, 08:37 PM
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I would buy a used header.

The money you pay for the RB, it's just way too expensive.
Old 06-10-07, 06:25 PM
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So I took it for a went for a ride today and it was gettin past the 3800 rpm hesitation . Then later it wouldnt get past it at all threw every gear so its really makin me po'd so im gonna take everyones advice and go back down . And keep workin at her thanx for everyones help that replied to my questions .
Old 06-10-07, 07:08 PM
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The reason your car is bogging after 3800 is the 880cc injectors and pump. The secondaries come online @ 3800, so at that point your fuel map is so rich, I'm surprised it even runs at all.
Old 06-10-07, 07:54 PM
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Your engine probably looks like someone threw a pack of oreo's into it now too.....
Old 06-10-07, 07:58 PM
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Originally Posted by NickCesar
Your engine probably looks like someone threw a pack of oreo's into it now too.....

lol
Old 06-11-07, 03:33 AM
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Originally Posted by 13b4me
The reason your car is bogging after 3800 is the 880cc injectors and pump.
Agreed, although it'll just be the injectors, not the pump.

The hesitation is caused by the mixture suddenly going ~35% richer when the secondaries come on. Get those damnned things out, they're not helping at all, only hindering.
Old 06-11-07, 04:43 PM
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what if i get the computer recalibrated ? you know change the fule maps and air maps
Old 06-11-07, 05:37 PM
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You'll have a REAL hard time reprogramming a S4 N/A ECU. Or any N/A ECU for that matter. You should sell the injectors and pump. Then you'll have enough money to get the appropriate stock parts, and maybe even a few goodies. Think smart.
Old 06-11-07, 07:23 PM
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Originally Posted by 13b4me
You'll have a REAL hard time reprogramming a S4 N/A ECU. Or any N/A ECU for that matter. You should sell the injectors and pump. Then you'll have enough money to get the appropriate stock parts, and maybe even a few goodies. Think smart.

I have never sold anything online as of yet . So should I try puttin them up on E-BAY or somthing . I know they were expensive as hell and an apparent waste of my money and time . I suppose I should have thought this threw better . DO any of you have an N/A if so are you running the 460cc injectors and what kinda power are you seeing .
Old 06-11-07, 08:04 PM
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How do you know if they are low or high impedence like these ones

http://www.car-stuff.com/cs_auto/mmp...Fuel+Injectors
Old 06-12-07, 06:01 AM
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I hope you still have the old injectors, because if they were just leaking then professional cleaning will restore them to near-new condition for a fraction of the price of new ones.

Last edited by NZConvertible; 06-12-07 at 06:07 AM.
Old 06-12-07, 04:10 PM
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I dunno ill have to take a look around . I may have gotten rid of them if so then oh well . Who could I send them to get them rebuilt ?

Last edited by Toxindude; 06-12-07 at 04:23 PM.
Old 06-13-07, 05:20 PM
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Somone please tell me there are only two injectors on the 86 N/A cuz I keep reading that there are four but I only see two on my car and its making me second guess .
Old 06-13-07, 07:42 PM
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There are 4, but you can only see the secondary rail with the intake manifold still on the car.
Old 06-13-07, 08:43 PM
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880's! lol wow
Old 06-13-07, 09:24 PM
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Originally Posted by 13b4me
There are 4, but you can only see the secondary rail with the intake manifold still on the car.

Yeah okay im stupid thats prolly the only reason the car even runs is because it still has two stock injectors on it . I looked before in my repair manual and it didnt say anything about four of them . Thats great just great !!!

I went out to take a look are they like impossible to see with out taking it off cuz I looked pretty hard and didnt see them ?

Last edited by Toxindude; 06-13-07 at 09:36 PM.
Old 06-14-07, 01:53 AM
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This info is easily found in the Factory Service Manual. If you don't have the FSM, click here and download it in PDF format for free. For future questions, the FSM should always be referenced before posting, as many times the answer will be in there.

You have to remove the UIM to get to the primary injectors, as you'll see when you read the manual...
Old 06-14-07, 10:43 PM
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Yeah I looked in the Manual and the section is missing so im gonna get adobe so I can read that link you posted .


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