Fuel Injectors not pulsing - Automotive Wiring and Electrical


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

Fuel Injectors not pulsing

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical

JB99SS
New User

Mar 27, 2008, 4:46 PM

Post #1 of 6 (2128 views)

Fuel Injectors not pulsing	Sign In

I have a 1993 Chevy pickup with a 5.0 L engine. It is TBI. It quit cranking/running. I can spray starter fluid in it and it fires and runs until the fluid is gone. The fuel pump is pumping fuel to the TB and it has the correct fuel pressure. It has good spark at the plugs.

But I have no injector pulse.

I have tried unplugging the connector at the Throttle Position Sensor and cranking the engine to see if it was stuck in the wide-open position. This did not work. I’m out of ideas or things to check.

Thanks and regards,

James

way2old
Veteran / Moderator
way2old profile image

Mar 27, 2008, 5:09 PM

Post #2 of 6 (2121 views)

Re: Fuel Injectors not pulsing	Sign In

Check all the fuses. There are 2 fuses that feed the computer. They are labeled ECM A(or 1) and ECM B(or 2).

Being way2old is why I need help from younger minds

JB99SS
New User

Mar 28, 2008, 5:11 AM

Post #3 of 6 (2115 views)

Re: Fuel Injectors not pulsing	Sign In

The fuses are good...
Are there any other sensors that can control the injectors? like the way the Throttle Position Sensor will cut off the injectors to clear a flood condition.

Thanks

dave284
Enthusiast

Mar 28, 2008, 6:10 AM

Post #4 of 6 (2113 views)

Re: Fuel Injectors not pulsing	Sign In

http://www.autozone.com/...airInfoPages.htm#top to add heres some info/test that might help too....I wouldn't rule out the pcm being bad yet

JB99SS
New User

Mar 28, 2008, 12:15 PM

Post #5 of 6 (2105 views)

Re: Fuel Injectors not pulsing	Sign In

Can the Ignition Module cause this to happen?

If the PCM has failed, is it just by chance that the Injectors are the only things effected?

way2old
Veteran / Moderator
way2old profile image

Mar 28, 2008, 3:51 PM

Post #6 of 6 (2100 views)

Re: Fuel Injectors not pulsing	Sign In

Check the injector wiring at the throttle body closely. They were bad about getting pinched under the air filter housing.

Being way2old is why I need help from younger minds

Search for (options) Privacy Sitemap