i have a 91 sunbird 2.0l ,car starts with ether and stays running ,shut off wont start

Asked by silverado_2150 Jan 15, 2017 at 12:42 PM about the 1991 Pontiac Sunbird 2 Dr LE Coupe

Question type: Maintenance & Repair

grounded dt port fan comes on got 34 code(map sensor) ,changed map and coolant sensor no change put noid light on no pulse when cranking,any ideas would be great

4 Answers

38,755

Without the injector pulse I don't think anything will happen. The pulse probably comes from computer I'm not sure ,ignition modulator ? ?, look on u-tube there are many useful car repair vids.

10

Stupid question, but did you check all the injector plugs? No pulse from any then I would suspect the ECM. My service manual for my 94 2.0L says the ac low press sensor can read too low (out of range) and cause a no start signal. Says unplug sensor and try starting. If starts replace it. Also says same thing about the MAP sensor but you have replaced it already.

10

There is a fuse for the ECM. If your check engine light stays illuminated when you turn key to ON and leave it there its most likely good. There is a 50psi fuel requirement for the injectors to work. Once started the fuel regulator reduces that to 7-8 psi. But it must produce (47psi, I think) to get the injectors to open. Hope this helps

Your Answer:

Sunbird

Looking for a Used Sunbird in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

CarGurus Experts

  • #1
    skindesign
    Reputation
    180
  • #2
    Louise Taylor
    Reputation
    100
  • #2
    bigant420
    Reputation
    100
View All

Find great deals from top-rated dealers

Search

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.