What's up guys, I was doing a small launch and kind of backed out of it halfway through and just took off driving. Then I got a backfire and lost power for a minute at about 55 mph (on the highway). Got power back and turbo was spooling fine and then lost power again. Could not get it started again. My first thought was the fuel pump. Any other suggestions? Thanks so much!
Backfire and a tow truck
- Thread starter moneyG
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Pau Hana
"But, officer........."
Re: Backfire and a tow truck
Do tell- why?
I know that some diesels rely on high pressure in the oiling system to fire the injectors (Ford Powerstroke) but what does the oil level have to do with the no-start condition?
Do tell- why?
I know that some diesels rely on high pressure in the oiling system to fire the injectors (Ford Powerstroke) but what does the oil level have to do with the no-start condition?
Don W.
Stab it and steer it
Pau Hana
"But, officer........."
Re: Backfire and a tow truck
My question was about the suggestion above to check the oil in a typhoon as part of a no-start diagnosis....
Nope- F-250/350.
My question was about the suggestion above to check the oil in a typhoon as part of a no-start diagnosis....
dalwine250
Donating Member
Re: Backfire and a tow truck
can you hear the fuel pump ? check fuel pressure ?
can you hear the fuel pump ? check fuel pressure ?
Don W.
Stab it and steer it
Re: Backfire and a tow truck
I know about the Fords. But what does oil, or lack thereof, have to do with a no-start in a SyTy?
If you're thinking of the fuel pump not running unless there is oil pressure that is a misnomer. The fuel pump runs for two seconds with key-on then continues to run as soon as the ECM receives ign pulses. The oil pump sw is just a backup, bypassing the relay. I ran for a year with it disconnected with narry an issue.
I know about the Fords. But what does oil, or lack thereof, have to do with a no-start in a SyTy?
If you're thinking of the fuel pump not running unless there is oil pressure that is a misnomer. The fuel pump runs for two seconds with key-on then continues to run as soon as the ECM receives ign pulses. The oil pump sw is just a backup, bypassing the relay. I ran for a year with it disconnected with narry an issue.
Syclone#892
Member
Re: Backfire and a tow truck
It's been a while but from what I remember, if the oil pressure sensor sees zero psi it will shut the fuel pump off. If you unplug it as I have because I don't use the stock gauge it defaults to max psi. Can't remember which wires but if you connect the 2 it won't turn the pump on.
The original poster I would guess bad ign module or fuel pump. Ign modules can get goofy when they get hot and cause random issues like that.
It's been a while but from what I remember, if the oil pressure sensor sees zero psi it will shut the fuel pump off. If you unplug it as I have because I don't use the stock gauge it defaults to max psi. Can't remember which wires but if you connect the 2 it won't turn the pump on.
The original poster I would guess bad ign module or fuel pump. Ign modules can get goofy when they get hot and cause random issues like that.
Pau Hana
"But, officer........."
Don W.
Stab it and steer it
Re: Backfire and a tow truck
X2 on the ign module. FYI at the oil pressure sw, tan is the ga, red is hot, grey drives the FP (directly so if you short red to grey with the key on OR off the pump should run. Exactly the same as putting 12v on the FP test term.) And I don't know which way it goes when disconnected. Back in the day it would be 0 and if you grounded the wire at the sensor it would peg the ga. But that was then.
To say it different, if I start my truck cold and shut it off quickly the oil pressure stays up for awhile. While it's up the FP continues to run even with key off.
The oil pres sw is NOT an engine protection device. If you lose oil pres while driving the motor will continue to run. For a while...
IMHO the oil pump sw that drives the FP is a back-up to the relay in case the relay fails.
X2 on the ign module. FYI at the oil pressure sw, tan is the ga, red is hot, grey drives the FP (directly so if you short red to grey with the key on OR off the pump should run. Exactly the same as putting 12v on the FP test term.) And I don't know which way it goes when disconnected. Back in the day it would be 0 and if you grounded the wire at the sensor it would peg the ga. But that was then.
To say it different, if I start my truck cold and shut it off quickly the oil pressure stays up for awhile. While it's up the FP continues to run even with key off.
The oil pres sw is NOT an engine protection device. If you lose oil pres while driving the motor will continue to run. For a while...
IMHO the oil pump sw that drives the FP is a back-up to the relay in case the relay fails.
SY2932
Administrator
Re: Backfire and a tow truck
X3 on the ignition module.
"If the chip is installed correctly, and you definitely have both spark and fuel pressure, your ignition module is dead. A bad ignition module won't generate a reference pulse preventing the injectors from firing. Part number is 1048-2827 (located under your distributor cap, BTW). Some auto chain stores can test to confirm it it's good or bad."
However being that you had a backfire, I would test the MAP sensor first to be sure that the diaphragm didn't get damaged. If you get the ignition module tested, be sure to have it tested a few times even if it passes the first test. I have seen ones pass the first test only to fail more and more parameters as they are tested and heat up... If you have one of those problem children, it will be ok in your truck until it heats up and then you're going to need a tow again.
X3 on the ignition module.
"If the chip is installed correctly, and you definitely have both spark and fuel pressure, your ignition module is dead. A bad ignition module won't generate a reference pulse preventing the injectors from firing. Part number is 1048-2827 (located under your distributor cap, BTW). Some auto chain stores can test to confirm it it's good or bad."
However being that you had a backfire, I would test the MAP sensor first to be sure that the diaphragm didn't get damaged. If you get the ignition module tested, be sure to have it tested a few times even if it passes the first test. I have seen ones pass the first test only to fail more and more parameters as they are tested and heat up... If you have one of those problem children, it will be ok in your truck until it heats up and then you're going to need a tow again.
Re: Backfire and a tow truck
Thank you so much guys!!! I'll give it a try asap.
X3 on the ignition module.
"If the chip is installed correctly, and you definitely have both spark and fuel pressure, your ignition module is dead. A bad ignition module won't generate a reference pulse preventing the injectors from firing. Part number is 1048-2827 (located under your distributor cap, BTW). Some auto chain stores can test to confirm it it's good or bad."
However being that you had a backfire, I would test the MAP sensor first to be sure that the diaphragm didn't get damaged. If you get the ignition module tested, be sure to have it tested a few times even if it passes the first test. I have seen ones pass the first test only to fail more and more parameters as they are tested and heat up... If you have one of those problem children, it will be ok in your truck until it heats up and then you're going to need a tow again.
Thank you so much guys!!! I'll give it a try asap.