Tonight, my car shot out a 4" flame
07-20-2005, 10:08 PM
#1
Tonight, my car shot out a 4" flame
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?
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?
07-21-2005, 12:46 AM
#11
Originally Posted by s0ber
You probably flooded the engine with all those cranks and when you did it backfired a nice gulp of gas? I dunno
haha...jk
just wanted to say cute puppy and i love the max!
07-21-2005, 06:13 AM
#13
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.
07-21-2005, 08:20 AM
#15
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?
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?
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.
07-21-2005, 12:10 PM
#19
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
http://faq.f650.com/FAQs/BackfiringFAQ.htm
Originally Posted by some website found on google
an additional factor in backfiring is air leakage into the exhaust system
Note to self. . . do not park behind bijangxe
07-21-2005, 12:10 PM
#20
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.
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.
07-21-2005, 03:40 PM
#22
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.
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.
Originally Posted by Jeff92se
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?
07-21-2005, 06:37 PM
#23
Senior Member
Join Date: Dec 2004
Posts: 150
Originally Posted by MrEous
I would think your car is running a little rich due to no cat as well.
07-22-2005, 12:56 AM
#28
I couldn't fix your brakes, so I made your horn louder
iTrader: (6)
Join Date: Jan 2002
Posts: 2,588
Originally Posted by Wetballoon
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.
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.
07-22-2005, 08:55 AM
#29
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?
07-22-2005, 09:10 AM
#30
Originally Posted by turbomax97
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.
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..
07-22-2005, 09:15 AM
#31
Originally Posted by MrEous
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.
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.
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.
07-23-2005, 02:07 PM
#37
Well I should wrap this up before I start to ramble.
Join Date: Feb 2003
Posts: 1,830
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.
