lv

Its my friends car, and im totally baffled. Need help or ideas.
Dont get mad but its a totally stock 93. Im posting here because this is where the knowledge is.

The first cylinders turbo starts glowing red even when idling.

We removed the cats because obvioulsy their damaged from the extreme heat and fuel.

Replaced the 02 because it was totally dead and not moving.

The fuel pressure is 5psi over stock. (good enough)

The coolant sensor and harness ohms out in spec throught the range.

The fuel system holds fuel pressure perfectly for over an hour without dropping (engine off)

Actual injector ms is ~4ms during warmup and ~2ms after warm up and idling. This was checked at both injectors. Also confirmed that the computer was NOT sending a signal to the secondarys.

The car only has the gutted downpipe on it now, and is backfiring flames out of it from the excessive fuel.

Only the first cylinder glows

Replaced both primary injectors (from my car).

The engine runs smoth,(except for the intermittent back fire) revs fine, but were not driving it like this.
How the motor has survived is baffling.

What am i overlooking here????
Ideas Please.

1FastT2

iTrader: (1)

Cylinder?

lv

Well, the front rotor exhausthousing.

Edit that the 02 stays on ~.9+ during idle.
Where is the extra fuel coming from.

The car will boost only 1 time correctly. after that, hadly no boost.
Desparate for help here. The car has fouled the plugs 1 time.

Suds7

heh, cylinder heh heh.. thought he was talking about his clutch.

Your front rotor housing is glowing?

lv

Glad to see you got a laugh from my use of "cylinder". How about some help, and well all laugh together.

Quoted from the 3rd gen section:\

Then look at the definition of Rotary Engine:

Main Entry: rotary engine
Function: noun
Date: 1837
1 : any of various engines (as a turbine) in which power is applied to vanes or similar parts constrained to move in a circular path
2 : a radial engine in which the cylinders revolve about a stationary crankshaft




So according to the second definition the original Wankel Rotary does in fact have a cylinder, but would the newer version (forgot the name of the guy that refined it for Mazda in the 60's) still be considered a cylinder engine? Because the housings don't revolve around the rotor anymore...

maxcooper

The turbine housing for the primary turbo is what is glowing, apparently.

I suggest trying stock fuel pressure (see my post in the 3rd gen section) as a next step.

-Max

HeffBoost

I would say this is the problem. Does it have an upgraded pump? Without a way to tune some of the extra fuel back out then you would run rich. I had minor problems after my pump install with just a couple extra pounds of fuel pressure.

lv

It still has the stock pump.
This is the only possible problem so far---just didnt think it was enough to cause this condition. Considering this is my only lead as of now, i'll pursue it.

MAX---thanks for your matureness

lv

Max--thanks for pointing out that only the front gets exhaust flow at idle-----
Totally overlooked this----
I was diverting my attention to that rotor for the main cause.
Now i can step back and look again.

cewrx7r1

iTrader: (2)

Another mistake, posted in the wrong forum!

radkins

Just so you know, both rotors (cylinders) flow throgh both turbos, so you problem isn't just the front rotor.

lv

Found a small split in a Vacuum hose routing of the fuel pressure regulator. (go figure, so i replaced them all)
this dropped my fuel pressure by ~4
this has made the biggest difference of all.
Not glowing anymore---no more backfires through the DP.
Im totally amazed that ~4 psi would make "THIS" much difference.
The sequential is not working correctly----ran out of time, but on the test drive you dont feel the second turbo come in.
Off to track that down tomorrow. Any first hand suggestions???

Maxcooper----and others, thanks for your help and matureness.
Im inviting everyone over for FREE BEER. (unless you were one of the ones that made fun of my cylinder comment)
Because the beer is being served in CYLINDERS!!!

Piranha

Just for ***** and giggles and not to be a smartass, the rotary engine they are referring to in the 2nd defenition is actually a pistion engine with pistons all the way around in a circle. They were on airplanes way back when, in the 1930s (I could be way off). You can still see people flying them, and you can tell because you see all the cylinders and cooling fins for them all over.