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Ecm and injectors are not communicating with each other.

Ecm and injectors are...

Ecm and injectors are not communicating with each other. injectors replaced and 2 reman. ecm's installed and no starting. motor does turn over

Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged?

Yes and yes

Mechanic's Assistant: What is the model/year of your Pontiac?

91 sunbird le rag top

Mechanic's Assistant: Are you fixing your Sunbird yourself? What have you tried so far?

I tried but then took it to the local chevy store. they are the ones that said no communication

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

If he needs more info

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Answered in 1 hour by:
1/14/2018
Cesar Jimenez
Category: Pontiac
Satisfied Customers: 182
Experience: shop foreman at carmona repair
Verified

hi im cesar jimenez and i will be assisting you today. im reviewing quesiton now......

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have you replaced anything already??

what codes are stored in ECM??

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Customer reply replied 7 months ago
I have replaced the entire fuel system from the gas tank to the fuel regulator. Including the injectors. I don't know what the codes are on the ecm. The connector is so old that I cant find one to hook to it. The Chevy dealer told me about the lack of communication. It may not be the ecm. I put a locking gas cap on it and now the gas flow stops.

i do not have anymore info in this particular problem. i will open it for another expert

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Roy Belding
Roy Belding, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 7,900
Experience: Master ASE since 1980
Verified

do you still need help??

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Customer reply replied 6 months ago
Roy. I am going to take the locking gas cap off this weekend and see what happens. But probably yes.

ok, but why are you going to do this??

Roy

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Customer reply replied 6 months ago
I realized that my problem didn't start until I put that cap on, and I've noticed that no gas goes thru the fuel rails ike its a vapor lock.

ok, it is not the cap but try it anyway to satisfy your curiosity. if that were the case you would have other issues

Roy

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Customer reply replied 6 months ago
after I put the cap on itstill ran good. Then it would die. Seconds later it would start and go. It did that for about a week then one day it died and that was it.

ok

I know you have replaced parts in the fuel system but I would start by checking the fuel pressure to be sure the pump is working

Roy

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Customer reply replied 6 months ago
Have done both. The pressure just stops. the pump is new, the tank, the pressure regulator. The fuel lines are original and there is a canister thing before the regulator that I can find no reference on.

what was the fuel pressure???

can you post a picture of what you have???

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Customer reply replied 6 months ago
Its been over a year since it went dead so no I don't remember the pressure. I do know it was strong. Pictures of what?

ok, a year is a long time. it still needs to be checked.

the canister thing you told me about

Roy

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Customer reply replied 6 months ago
What about the canister? I didn't get the entire message.

your response

Have done both. The pressure just stops. the pump is new, the tank, the pressure regulator. The fuel lines are original and there is a canister thing before the regulator that I can find no reference on.

want a picture of the canister thing

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Customer reply replied 6 months ago
OK. I work til after dark but will do what I can. Where do I send it?

upload it here

Roy

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Customer reply replied 6 months ago
OK. I'll see if I can get it sent tomorrow. I work late so don't expect it early. Thanks Roy.

your welcome

Please take a moment and rate my service 3 stars or better. that is the only way the site will pay me for my efforts.

Roy

Roy Belding
Roy Belding, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 7,900
Experience: Master ASE since 1980
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