Dear God.....

I tried cranking my car tonight, it's been having issues with wanting to turn on lately....sometimes it would crank no problem. I've changed everything that could be causing the problem except the ignition switch.

I turned the key and it backfired like hell shooting a ~4" flame out the muffler. 2 people saw it, I didnt. Color - blue and orange

WTF. Im lost as to why it's backfiring at all. I do have 1 code (egr flow malfunction) - but it's been there long before this started happening. I changed the starter, fuel filter, plugs, cleaned TB, changed oil, seafoamed, changed the brakes ( ) , fukin....what else..

Are these symtoms of the ignition switch?

 

maybe after all those cranks fuel stayed in the combustion chamber??

who knows...is it runnng better now?

 

Too much cronic in the combustion chambers.

 

Man, that sucks it wont crank.. But shooting flames is awesome!
My supra used to do that every time i'de let off the throttle after boosting real hard... good times

 

do you have a cat on your car?

 

Since you are probably a donating member, SEARCH = WIN!

I do have a very good idea why your car is backfiring.

 

Then why make that post and not tell him?

 

because it's Bijan, durrrrrr

 

You probably flooded the engine with all those cranks and when you did it backfired a nice gulp of gas? I dunno

 

wow!!! i hate to hear that, any change or improvement??? let me know when u figure out/remedy the situation

nelson

 

thanks for restating what i told him...

haha...jk


just wanted to say cute puppy and i love the max!

 

Hold the accelorator pedal down all the way and turn on the car--Proper way to clear a flooded engine. Also, no those are NOT the symptoms of a bad ignition switch.

 

I have been having the same problem. It cranks normal the first time in the day and after that it won't crank or it goes slow. I changed my starter and it did nothing. Next I am doing the ignition switch and clutch switch.

 

1) no cat
2) flooding the engine? I dont EVER press the gas when trying to start it.
3) I already searched.
4)...
5)still confused

 

Car has problems getting turned on? They have pills for that problem.

btw what happens when you crank the engine bro?? Just because you don't press the gas pedal, doesn't mean gas isn't going into the engine. This ain't a carb yO! You think the gas pedal is actually directly connected to the fuel delivery?

 

Well your setup to be in the next fast and furious movie

when you tried to crank before was it draging? could be a starter issue, flywheel+starter issue.

 

roll mo bluntz

 

If this thread were in a ricer forum, this guy would be getting praises and questions on how he did it, not solutions to a problem.

 

Might help:
http://faq.f650.com/FAQs/BackfiringFAQ.htm
Leaky injectors, Read about this issue a CTS owner was having, turns out his injectors all of them were leaking a bit.

Note to self. . . do not park behind bijangxe

 

IMO
EGR clogged and not allowing unburnt fuel (fumes) back into the intake...only one way for the fumes to go. Out.
Exhaust heat heated the fumes = fire

I would think your car is running a little rich due to no cat as well.

 

how did the rear bumper fair during all of this??

shoot, last week the beast backfired in my driveway...so its prolly happened more than once.......test pipe??


I KNOW!! just drive the mazda

 

Fuel injected - duh, thats exactly why I dont give it gas when cranking it. There's no point.

When I TRY to crank it, the RPMs jump to 2k - up and down up and down while turning the key trying to crank.

SOMEtimes it will backfire out the exhaust REAL loud, sometimes it sounds like it's backfireing out the intake. Sounds ricer...but thats the only way I can explain it.

IF I keep turning the key eventually it will start and run NO problem. That's what makes me so confused, it's ONLY on crank ups. I've checked for pretty much everything.

 

Aren't all of the sensors that determine A/F ratio in front of the cat? Why would no cat create a rich condition. As I understand it the third O2 is just there to monitor the functioning of the cat.

 

Good point.......

 

Bad gas?

12345

 

hey that always seems to work

 

LOL omg that's so scary

 

Regardless it doesn't matter in either scenario at this point. The ecu isn't reading the a/f ratio per o2 sensors at startup anyway.

The egr would have little to do with it.... Most of the unburnt exhaust would leave the exhaust anyway.... let me know when you find the egr valve on the front header.

As mentioned before... Push the gas pedal to the floor - this sends a signal to the ecu to cut fuel because of a flooded engine.

If after trying the gas pedal to the floor method it works - there's your problem - leaky injectors most likely...

Are you getting decent voltage from the battery? POS sensors in order? Camshaft pos in order? Coils seated? Plugged in?


My bet is on the crankshaft position sensor either under the crank pulley, or between the tranny and engine.

 

Not to hijack your thread but it's funny this thread came about cause my car is doing the exact same thing except no flames coming out. Sometimes she is good about cranking, and then sometimes I have to give her a little gas to crank up. If someone can help us out, that would be great. Any advice on what to do?

 

I just went out and cranked it w/ the gas pedal to the floor...it didnt act ANY different than if I DIDNT press the pedal.

I'm 99% sure my battery is sending enough volts. My HIDs are not dim, and everything else works perfectly.

I changed out my plugs last week, coils are seated and in there properly.
The Crank POS. Sensor by the tranny is fine.

There's another one under the crank pulley? Havent checked that one but now I must..

 

Very good opinion. What part is clogged exactly? The tube running from the rear ex. manifold?

I was told by a few other ORGers that the code I have will go away by replacing the green plug sensor in the valley to the right of the knock sensor.

 

I completely forgot that it runs in open loop at startup.

 

bump.......

 

The flame is to light the enormous phillies...

 

I wish......

 

hhm the other day whe i cleaned my tb, i sprayed too much, and it backfired into the intake manifold... sounds like a bad injector..

 

I don't know what you guys talking about, But i Hardly Doubt that, You can flood the engine by just pressing the gas pedal before starting the car. Our car is Equipped with Electronic Fuel Injector System. To be accurate, Multi-port Fuel Injector. By just pressing the gas, Fuel will not spray into the engine, when it is not running. That concept was for the old Carburetor engines.

 

FAST AND THE FURIOUS STYLE!

kidding.

 

Bijan I like the updated sig

 

haynes manual says it's most likely egr, and just the for corrections sake it was not a 4" flame at all

it was about 10"
mainly blues maybe a little orange