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Question

2002 pontiac grand am se 2.2 has no pulse to 2 injectors- will not run. replaced pcm. no luck. any suggestions?

Submitted: 345 days and 12 hours ago.

Category: Pontiac

Value: $15

Status: AWAITING EXPERT REPLY

Posted by ase_master327 345 days and 12 hours ago.

Info Request

Hmmmm...
Which 2 injectors aren't getting pulse?

345 days and 10 hours ago.

Reply

sorry- my bad - no injector pulse at all

Edited by XXXXXXXXXX on 12/12/2008 at 9:36 PM

Posted by ase_master327 345 days and 9 hours ago.

Info Request

OK, that changes things.

Is there an antitheft light on?

345 days and 9 hours ago.

Reply

no antitheft

Posted by ase_master327 345 days and 9 hours ago.

Answer

Good deal..
Couple things to check, then.

1) Does the fuel pump come on for like 1-2 seconds when you first turn the key from off to run positions? If the pump does not run, you will look into relays and fuses and such.

2) On this setup you can't just pull a plug to see if it has spark.. So, lets try putting fuel in the engine. Spray some carb or brake cleaner in the engine (at the vacuum brake booster is the best place, just spray it into the engine.. make sure you get a good bit in there.. enough to run the engine. Does the engine run for like 1-2 seconds until the flammable spray burns out?

Let me know what you find!

345 days and 8 hours ago.

Reply

car fires for a few seconds, so spark is present.

Accepted Answer

OK.. Try checking fuse #48.
Here is the diagram of the injector wiring:

View Full Image

View Full Image

Accepts:
Expert:	ase_master327
Pos. Feedback:	100.0 %
Answered:	12/12/2008

Shop Owner

+15 years experience with Pontiacs. Bumper to bumper diagnosis & repair.

345 days and 7 hours ago.

Reply

fuse 48 is good

Posted by ase_master327 345 days and 7 hours ago.

Info Request

Is there power to it?

345 days and 7 hours ago.

Reply

yes power to and fuse good

Posted by ase_master327 345 days and 7 hours ago.

Info Request

OK.
Run a jumper wire from one of the injectors (computer side) to the battery ground, and pulse it, on and off a few times there.. with the key on.

Does the injector tick?

342 days and 14 hours ago.

Reply

yes it is ticking

342 days and 14 hours ago.

Reply

the ground is not present at injectors after car fires. does that help?

342 days and 6 hours ago.

Reply

problem is located. my tech did not see alarm flashing. it was alarm. we reset it. car runs fine. thank you for your time

Posted by ase_master327 342 days ago.

Info Request

Thats crazy.. If I would have worded my.. antitheft light.. and added 'or alarm' to it.. then we would have gotten to the bottom of it a bit quicker. I will remember that for future cutsomers with the same concern.

Thanks for choosing Just Answer!

341 days and 16 hours ago.

Reply

thank you.

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Question

2002 pontiac grand am se 2.2 has no pulse to 2 injectors- will not run. replaced pcm. no luck. any suggestions?

Info Request

Hmmmm... Which 2 injectors aren't getting pulse?

Reply

sorry- my bad - no injector pulse at allEdited by XXXXXXXXXX on 12/12/2008 at 9:36 PM

Info Request

OK, that changes things. Is there an antitheft light on?

Reply

no antitheft

Answer

Reply

car fires for a few seconds, so spark is present.

Accepted Answer

OK.. Try checking fuse #48.Here is the diagram of the injector wiring: View Full Image View Full Image

Reply

fuse 48 is good

Info Request

Is there power to it?

Reply

yes power to and fuse good

Info Request

OK. Run a jumper wire from one of the injectors (computer side) to the battery ground, and pulse it, on and off a few times there.. with the key on. Does the injector tick?

Reply

yes it is ticking

Reply

the ground is not present at injectors after car fires. does that help?

Reply

problem is located. my tech did not see alarm flashing. it was alarm. we reset it. car runs fine. thank you for your time

Info Request

Thats crazy.. If I would have worded my.. antitheft light.. and added 'or alarm' to it.. then we would have gotten to the bottom of it a bit quicker. I will remember that for future cutsomers with the same concern.Thanks for choosing Just Answer!

Reply

thank you.

Related Pontiac Questions

Hmmmm...
Which 2 injectors aren't getting pulse?

sorry- my bad - no injector pulse at all

Edited by XXXXXXXXXX on 12/12/2008 at 9:36 PM

OK, that changes things.

Is there an antitheft light on?

OK.. Try checking fuse #48.
Here is the diagram of the injector wiring:

View Full Image

View Full Image

OK.
Run a jumper wire from one of the injectors (computer side) to the battery ground, and pulse it, on and off a few times there.. with the key on.

Does the injector tick?

Thats crazy.. If I would have worded my.. antitheft light.. and added 'or alarm' to it.. then we would have gotten to the bottom of it a bit quicker. I will remember that for future cutsomers with the same concern.

Thanks for choosing Just Answer!