How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask mike switzer Your Own Question
mike switzer
mike switzer,
Category: Subaru
Satisfied Customers: 546
Experience:  lead diagnostic tech at Aamco
93239347
Type Your Subaru Question Here...
mike switzer is online now
A new question is answered every 9 seconds

It won't start. a mechanic said it was the fuel pump. so we

Customer Question

It won't start. a mechanic said it was the fuel pump. so we put a new pump in. Now he says The ECM may be bad
JA: Have you ever replaced the fuel pump, or is this the original?
Customer: I just replaced it wih a new one
JA: What is the model/year of your Subaru?
Customer: 99 subaru forester
JA: Are you fixing your Forester yourself? What have you tried so far?
Customer: I've had a mechanic look at it. a new fuel pump has been put in. Now we may need to put in a new ECM
JA: Anything else you want the mechanic to know before I connect you?
Customer: no thats it
Submitted: 3 months ago.
Category: Subaru
Expert:  david craig replied 3 months ago.

Hi Im David. how did the mechanic determine it was the fuel pump? obviously he was wrong, but what made him think that?

Customer: replied 3 months ago.
well he tried starting it with starter fluid to bypass the mass air flow intake sensor yet it won't start
Customer: replied 3 months ago.
what do you think it is
Expert:  david craig replied 3 months ago.

I cant tell you that until i find out a few things. first, when you turn the key to the run position,(not start) can you hear the fuel pump run for a few seconds?

Customer: replied 3 months ago.
I can't hear anything. But the mechanic said he couldn't hear the fuel pump
Expert:  david craig replied 3 months ago.

ok. did he take the fuel pump relay out and jumper the relay base to see if the pump runs?

Customer: replied 3 months ago.
No he didn't do that
Expert:  david craig replied 3 months ago.

thats the first thing he needs to do. that can eliminate the wiring to the pump if it runs when he does that.

Customer: replied 3 months ago.
Well he did say he can do that to get the car running but that won't be the right thing to do
Expert:  david craig replied 3 months ago.

i just want to make sure the wiring is ok. i didnt say we were going to keep the jumper in....

Expert:  david craig replied 3 months ago.

this mechanic is worrying me

Customer: replied 3 months ago.
assuming the fuel pump runs when jumps it with a wire. what would be the next move
Expert:  david craig replied 3 months ago.

lets not assume anything and jump ahead. i dont work like that. one step at a time.

Expert:  david craig replied 3 months ago.

ill be back on in about 30 minutes. keep me updated

Expert:  david craig replied 3 months ago.

any update?

Customer: replied 3 months ago.
no updates. he hasn't worked on the car todaybasically i'm trying to see if his claim that i need a new ECM is valid
Expert:  david craig replied 3 months ago.

i understand, and there are test we need to do to determine that. just to jump to that conclusion without verification is no way to troubleshoot.

Expert:  david craig replied 3 months ago.

any update?

Expert:  david craig replied 3 months ago.

do you still need assistance?

Expert:  mike switzer replied 3 months ago.

i would look at the crank sensor before the ecm. if the crank sensor is bad you will have no spark so starting fluid will not work. you cant really hear subaru fuel pumps due to the location under the seat. i would take off the fuel feed line at the engine to verify that it works. i have seen very few as in i think two subaru ecms go bad

Related Subaru Questions