No spark, no fuel

Tiny
CHRIS GOULD
  • MEMBER
  • 1998 DODGE RAM
  • 5.9L
  • V8
  • 4WD
  • AUTOMATIC
  • 106,093 MILES
I have the 1500 model. I do not have spark or fuel. Have checked all fuses and relays multiple times. New crank sensor, new coil. New fuel pump. Odometer flashing and throws codes 920 and 921. I am able to jump the fuel pump off the relay terminal but still no fire.
Tuesday, July 18th, 2017 AT 12:26 AM

53 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try a security system reset. I think on your car you lock drivers door with key, unlock with key then try to start. Other wise try the link that is attached. kind of sounds like a security problem.
https://www.2carpros.com/articles/how-to-reset-a-security-system
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
CHRIS GOULD
  • MEMBER
  • 11 POSTS
Tried that still no spark or fuel pump kicking on. Even installed a different PCM still same exact thing
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If the new pcm wasn't programmed to your truck it won't start anyhow
check fuses and asd relay under hood
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
CHRIS GOULD
  • MEMBER
  • 11 POSTS
Even if the PCM is out same yr with same motor? Have checked & fuses & relays multiple times, all good.
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Yes because the pcm's have a security system and if it is not programmed to your truck then it won't start. you should scan for codes with OLD computer and check fuel pressure with a gauge auto parts rent it. see link.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
CHRIS GOULD
  • MEMBER
  • 11 POSTS
No codes with old computer. Just says error when I put a scanner on. And there is no fuel pressure because the fuel pump doesn't kick on
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You may have a broken wire or connector where you plug scanner in try another one if you have one available. see link for no start as well it may be a security issue too with old computer in truck and hooked up did you try the security reset by locking/unlocking driver door that I first sent?
https://www.2carpros.com/articles/car-cranks-but-wont-start
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
CHRIS GOULD
  • MEMBER
  • 11 POSTS
Yes I did, multiple times. Ok I'll try & get another scanner
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
CHRIS GOULD
  • MEMBER
  • 11 POSTS
Hooked another scanner, a more advanced one. Still read error. The truck acts like it wants to start but just continues to turn over
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,321 POSTS
Hello,

It sounds like you may have an ASD relay that is bad here is a guide and some wiring diagrams to help you do some more testing.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please let us know what happens.

Cheers, Ken
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
CHRIS GOULD
  • MEMBER
  • 11 POSTS
All relays are good. Now all of a sudden I have fuel pump but doesn't just prime. It stay on continuously. But still no spark. Pls help!
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,321 POSTS
It sounds like its time to do a pin to pin check on the computer to see if you have all the power and grounds are working. Use the wiring diagram above.

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what you find.

Cheers, Ken
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
CHRIS GOULD
  • MEMBER
  • 11 POSTS
As far as I could tell everything was ok. Still no spark & fuel pump stays on doesn't just prime. Have replaced wiring harness, pcm, crank sensor, cam sensor, idle air sensor, tps. Odometer still flashes & throws codes 920 & 921
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Monday, July 6th, 2020 AT 1:42 PM
Tiny
98_DODGE_RAM_SPORT
  • MEMBER
  • 2 POSTS
  • 1998 DODGE RAM
V8 Two Wheel Drive Automatic 115000 miles

OK, where do I start. My 98 dodge ram 1500 5.9L recently stalled on me. After attempting to jump start the truck the gauge lights started clicking and I could not start. It cranks fine and everything works as far as windows, wipers, lights and all accessories. I do NOT have spark to the plugs and the fuel pump does NOT turn on. I bypassed the fuel system relay and the pump does work and I get pressure to the rail but only after bypassing it. It does not prime when key goes to on position. Also, the check engine light comes on and shuts off like normal with PCM plugged in but also after I removed the PCM.

I checked the ASD relay as well as all other relays and fuses. Everything checked out good. I replace the Crank Position Sensor however still nothing. I tried 2 different OBDII scanners and both gave me a link error. I have 12v getting to the PCM and grounds seem fine. The dodge dealership diagnosed the problem as a bad ground off the battery stating it had 200 ohms resistance. I have replaced that and still nothing. I have 12v to all the relays and fuses. What could this problem be? This has been going on for 3 weeks and is causing me to lose work days. I have no voltage at both injectors and coil. Any help is greatly appreciated. Thank you, Dustin
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Sunday, December 13th, 2020 AT 10:00 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check fuse no.9 10 amp in junction block right end of dash and fuse no. 6 30 amp in the PDC if both okay and the ASD tested good-there's a problem with the computer ASD relay ground control circuit
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Sunday, December 13th, 2020 AT 10:00 AM (Merged)
Tiny
98_DODGE_RAM_SPORT
  • MEMBER
  • 2 POSTS
I jumped 87 to 30 and got 12 volts to the coil however still no spark. The fuel pump also did not prime. I bypassed the fuel pump relay for constant fuel however still nothing. There is plenty of pressure at the rail.

Ok, well the PCM I ordered arrived a few minutes ago and now the truck is running. As stated above, all fuses and relays were tested good. What is the ASD relay ground control circuit? Does that mean the PCM is bad?

Well everything seemed ok until I scanned the comp for new codes. It have me codes p02001-p0208. I can see that this would be a injector circuit issue however what would you think is the cause? I noticed a rough idle (had this issue on and off before new pcm as well) so I scanned it and those were the results. I have heard maybe a TPS sensor. Does that seem right? Thanks
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Sunday, December 13th, 2020 AT 10:00 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,321 POSTS
Hey 98_Dodge_Ram_Sport,

It sounds like you have an injector that is shorted or the wiring is shorted or open. Here is a couple of guides and a wiring diagram so you can do some testing.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please let us know what you find so it will help others.

Best, Ken
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Sunday, December 13th, 2020 AT 10:00 AM (Merged)
Tiny
GONZO1234
  • MEMBER
  • 15 POSTS
  • 1998 DODGE RAM
  • 5.2L
  • V8
  • 4WD
  • AUTOMATIC
I have 98 dodge ram 5.2 that wont start. The engine coolant temperature broke so the
wires touched the wire on the alternator. I think something shorted now the truck wont
start, it cranks but no spark and we have fuel. I have changed cam, crank, capsid coil and still no spank.
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Sunday, December 13th, 2020 AT 10:00 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I can't tell what damage the short might have done? As far as spark, check for primary voltage at the coil, engine cranking, Should be a green wire with orange tracer.

Can you tell if the computer is awake? With key on, check for ref voltage at any sensor that uses a ref voltage. If no ref voltage then have to check voltage and ground circuits to computer. If that is ok, have to suspect the computer.

Can you communicate with computer? Get an obd2 code reader, see if anything?

Hopefully it's just a blown fuse, somewhere?
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Sunday, December 13th, 2020 AT 10:01 AM (Merged)
Tiny
GONZO1234
  • MEMBER
  • 15 POSTS
I have p0113, p0118, p0123, p0463, p1492 are the codes I have. So I know the pcm is awake
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Sunday, December 13th, 2020 AT 10:01 AM (Merged)

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