Guys need some help - Car is Smoking

**Fosgate** · 10-15-2001, 12:04 AM

I think i was talking about my car too much and it end up breaking on me.
The car is FORD Laser TX3 Turbo (Mazda 323 GTI)

Well here is the story.
Last week since Tuesday my car started acting weird....
If i was to rev the engine in the first gear say up to 4000RPMs and then change to second, it felt like the car is going to stall during the acceleration,
it would accelerate 500RPMs then sort of stop then another 500RPMs and then again act like it cuts the fuel or something ...and all would be at revs around 2500-3000RPMs so i know its not because of over boosting.
Last Thursday i was driving home from work and suddenly it started doing the same thing and it just stall the engine completely and white smoke started coming out of the exost ( lots of smoke i tell ya).
Just had enough momentum to pull on a side of the road and open the hood.
Everything looked fine with the engine .... enough oil was there .... water too ... nothing that jumped to my eyes.

I tried starting the car but the same thing ....lots of smoke idle was crap and it would stall after few seconds.
I had a problem with the 4th cylinder before (that was the reason i reconditioned my engine however i didn't change the rings of the pistons or bored the cylinder walls) so i decided to disconnect the ignition of the 4th Cylinder and start the car up...
The car started idle wasn't too bad and it didn't smoke as much....
So i end up driving 14kms on 3 cylinder until i got him.... Well the car was going like crap it would start shaking after 2000RPMs and was very hard to climb any hill.
Anyway somehow got home put the car in the garage and started checking it out.
What it seems to do now is really weird.
Only Cylinders 1 and 3 operating and running the engine.... cylinders 2 and 4 are sparking and the fuel is gets in to the cylinder chamber but no combustion is happening....
After running the engine for few minutes the cylinders 2 and 4 get filled up with fuel and the fuel is ****ing out of the exost pipe as it would.
What some people suggested is that ECU keeps the injectors open and so too much fuel gets in to the cylinder chamber and that's why the combustion is not happening.
What i did is i connected oscilloscope to the G signal and Injectors 1 and 3 and i can see the signal relationship between G Signal and the 1&3 Injectors, which looked normal, then i tried the same thing with 2&4 injectors and there wasnt much of a signal....
Well what do you guys think...

**mp3ford** · 10-15-2001, 12:20 AM

Well what do you guys think...

I think you'd better start saving up for a new motor..

That white smoke indicates coolant sucked into the cylinder top end. You've got a cracked head quite probably. As a result of continuing to drive it, my guess is you've hydrauliced on coolant, and bent and or broke some **** in there - coolant doesn't compress, and something is going to give. Vibration above 2000 rpm is indications of serious primary imbalance of the bottom end now, which indicates you've probably done damage to the crankshaft as well. Your motor is done, but take it to a mechanic anyway for the post-mortum. Kinda hard to diagnose something from 7,000 km's away

**Fosgate** · 10-15-2001, 02:12 AM

Wohh that sounds pretty bad!
Well I fully reconditioned the head of the engine around month ago.
So you basicly saying that its leaking coolant in to the cylinders and thats why its blowing smoke and stuff.
But wouldnt in this case the coolent mix with the oil and make it to go white?
there ant any traces of water in the oil though...
And why wouldnt 2 & 4 work if that was the case?
I guess next smart thing would be to do is check the compression.

Well thanks MP3Ford at least something to think about.

**Aaron Cake** · 10-15-2001, 10:04 AM

Well I'm not an expert on piston engines (too many extra parts

) but I'll give it a go.

I agree with mp3ford. It sounds like the head has cracked and coolent is leaking into 1 or more cylinders. However, on second thought, could it just be the head gasket? Hvae you done a compression test?

**Fosgate** · 10-16-2001, 12:45 AM

I havnt checked the compression yet (well i dont have the compression tester just yet) but removing the spark plug and starting the engine i can see that there is a compression present.
The head gasket has been changed not even a month ago and the head as been fully reconditioned and some of the valves has been changed.
I got a suspition its the ECU that keeps the injectors open and so floding the engine with too much fuel... So i got to check that first...
I dont think its gona be as bad as changing the whole engine but if thats the case its gona cost me around AU$990 (US$460) so that can be an option too.

**hornet** · 10-16-2001, 12:58 AM

I dont know too much about this sort of stuff (gimme a carby n v8 ne day

) but could it be a 'sticky' injector? rather than the ecu holding it open, maybe its sticking open? Mite be an idea to get the injectors looked at, before you overhaul the entire engine.

just my 2 bob

**Fosgate** · 10-16-2001, 01:55 AM

Injectors were cleaned and adjusted not even a month ago... and i dont think that both of them will go at the same time.
Only link i can see between cylinder/injector 2 and 4 are the ECU lines that control them. Its a single line that controls both injectors. So more i think about it more i come to conclusion that its the ECU or something that makes it to keep those those injectors open. May be a signal from a distibutor or something makes the ECU to think that its need to put more fuel in as if its under high boost or something so ECU does so... But i would think if it was a signal then it would effect cylinders 1 and 3 as well not only 2 & 4, unless they controlled by separate signals.
Its so bloody hard to tell whats wrong with it i still dont know for certain if its something elctrical or mechanical!!!

[ 10-16-2001: Message edited by: Fosgate ]

**Aaron Cake** · 10-16-2001, 10:33 AM

I'm still thinking it's a head gasket/cracked block problem. Sticky injectors would result in black smoke, not white.

Have you pulled the computer codes?

As far as compression, an engine can have no compression and still sound right with the spark plugs out. Only way to reliably check is with a compression guage.

**52Burb** · 10-16-2001, 12:23 PM

I would check the ignition coil.. It's possible (and fairly common) to have a weak spark that will run the vehicle but give you almost no power. Check the spark plugs first, you may just have a fouled or incorrectly gapped plug that's keeping the spark from really igniting the fuel.

**Fosgate** · 10-16-2001, 10:14 PM

OK let me go through this one by one. I dont think the ECU i have has any fault codes i know some of them did but mine doesnt. If it was a crack whats the chances for being on both cylinders at the same time?
Compression well i still got to check that...
I changed the coil with another one but still the same thing so i guess that not the problem... Spark plugs looked like having the same gap for all of them but ill check that too...

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