Hey i just bought a 91 rex si with a b16a in it the car has set for the last 7 years so i changed all the fluids including gas. With a fresh battery the car started up prety easy idles great sounds like a new motor i replaced the dist. Cap,rotor,all with msd it came with the car. Any way i let the car idle for about 2 hours then tried to drive it it has no power what so ever past 3500 rpms, it will rev up past that but very slow the vtec works. Ok so the car has a true mugen comp. And was tuned on a apexi vafc then guy showed me dyno slips from when it was tuned in 05 showing it made 148whp with the mods it has done to it. So what the hell is the damage. Im going to thru the week drop the exhaust to make sure the cat is not cloged up and bring home my timing light to properley check timing.it has a new distbutor not that that matters because its all msd now any way but before the msd it ran the same.so please shoot me some help

 

come on somebody has have some kind of help

 

why is a jdm b16a only pushin 148? with bolt ons.

thought they were 160? or is that the 2nd gen

 

Whp is less. It sat a long time, probably needs rings. I would do a compression check and figure on a rebuild of some sort. Does the check engine light come on?

 

no check engine light and compression was around 200 psi per cylinder.he told me it was tuned for nitouis so maybe the retarded the mechanical timing idk going to check to night if its not to cold out side.

 

any body know if the timing marks are the same as a b18c1

 

they should be the same.
cam gears aligned, believe the middle mark of the group of 3 is your tdc

 

Incorrect. ^

The single mark is TDC. The 3 marks are used for setting ignition timing with a timing light.

 

thought the single mark was to set cam timing?

 

"Tuned" might mean it has been chipped and has the wrong fuel and ignition mapping for the stock engine.
It may also have the colder spark plugs in it from when it ran nitrous.

 

ok so its fixed.first off it was tuned and on a dyno thats how i have the slip with the whp.the nitrous was never shot it was never even hooked up.so any way i brought my good compression gauge home from work and every cylinder was at 190psi cold about 29deg.F checked timing all was good,changed plugs and started it no change. so last but not least off with the converter and presto a whole new car it was clogged up so bad. thanks to every one for there help

 

B16 no power??!?! That sounds about right

 

Interesting way to try and bump your post count up. Why don't you try and add something to the Forum instead?

OP - I would still change the filters and such - potentially look into the tune/ fuel system. There has to be more to your problem if it was fine before and now it destroyed the catalytic converter. Unless of course you don't care - then run it.

 

No sir. See post #6: https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/ignition-timing-service-connector-2549755/

 

ah. thanks for the clarification

 

Gotta wonder what the back story of this car is too. That cat could have been bought used, got clogged during tuning and 7 years of sitting probably wasn't healthy for it. The last owner probably ran it once a month at full throttle and clogged it up over 7 years.

 

EDIT - Was thinking something else. NOS is not directly harmful to the cat when tuned correctly.
Nitrous is horrible for cats. It's very corrosive.
^^ Disregard that.

ECU nitrous tunes run rich so when you are not on the bottle so the cat gets washed with fuel.
Hopefully OP has re-tuned for N/A.

 

Doubtful since the ECU is a "true" Mugen and it was "tuned" with a VAFC. Also, I am pretty sure washing cats with fuel is against the law (pun intended). Also, re-tune for N/A? ...but, the Nitrous...

I just reread the first post... He let the vehicle idle for 2 hours? Yikes.

 

2 hours was a bit much. might of done more harm.

 

LOL @ cats and fuel.
Guess I'm confused with the original post then.
More coffee!
Thought OP picked up car and wasn't interested in the nitrous.
Brings up interesting thought though....
VAFCs have multiple settings IIRC. So maybe there are actually two tunes on there?
One for nitrous and one for without?

[rant]I don't understand why the Mugen ECU is being used. It's just a fancy and expensive 'one size fits all' way to turn off a few sensors, remove limits, and maybe gain 5%hp. It's not being the correct tune for the unique engine it's being paired with and proven to run rich on stock B16s[/rant]

 

Np

And this thread haz some funnais.

 

well i talked to a couple of people and was told that the 88-91 b16a from japan wouldnt have had a converter on them any way,the us had convert laws befor alot of other countrys.i have a aem wide band and it seems to run prety much in the green the only time it gets a little lean is at 8500 by the time i shift.but im going to take a pr3 i have and have it chiped and tuned on crome i was thinking of running a dual chip with a micro switch one for street and one for race.

 

The catalytic converter would not have come with the B16A swap, it would've been on the CRX's existing exhaust system. Whether or not the po removed it or replaced it with a test pipe or just punched it out is all up to you to decide by actually looking under the car. The cat will be located towards the front of the car where the downpipe bolts to it. Let us know what you find because as Neva stated, you let the car idle for 2 hours, which is probably the fastest way to plug a cat up.

 

ok since nobody under stands when that motor was in japan in the crx it would not of had a converter on it,back then there was no law to have a converter on them.and as far as it sitting at idle for 2 hours well im a ase master tech and have never heard of a converter logging up from idleing on a normal running engine.so yes it did have a after market catco cat on it. and since i live in an area where there are no emissions im not going to install another one i just installed a piece of 2 1/2 ince pipe.and every body should know after market cats and i dont care what brand or size last about 1/4 of what a factory cat does.even faster when you run the **** out of the car.

 

very well could of been but in missouri that would be breaking a federal law. its illegal to sell a used cat for no.1 and illegal to install a used cat no.2