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Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo, Tech Trainer
Category: Ford
Satisfied Customers: 1526
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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Bob 2000 ford focus rebuilt motor was running now wont start

Customer Question

Customer: bob 2000 ford focus rebuilt motor was running now wont start have spark and gas
JA: Thanks. Can you give me any more details about your issue?
Customer: replaced fuel pump filter and rebuilt whole motor cranks but wont start
JA: OK got it. Last thing — Ford Mechanics generally expect a deposit of about $28 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: Ford
Expert:  Juan Crespo replied 1 year ago.

Hi there. Welcome to our site!


I’m a retired master technician and tech instructor with over 30 years experience. However, if you’re thinking on working on the vehicle yourself, all my knowledge and resources won’t help if you…

… don’t have tools or the skills to use them

… don’t know there will probably be some special tools and equipment needed for a proper diagnosis

… don’t realize it may take a few back and forth replies to solve the issue

… don’t understand that I will need you to provide specific information

That engine needs three things to start and run (compression, fuel and spark), which means one or more of those things is missing. If it's cranking but not starting you can eliminate compression and spark as being the culprits just by spraying a little starting fluid down the throttle. If it starts and runs momentarily, then the problem is fuel.

The fuel system in your Focus consists of two branches: fuel delivery (fuel tank, pump, filter, pressure regulator, lines,etc.) and fuel distribution (sensors, on-board computer, injectors, wiring, etc.)

Fuel needs to be delivered to the fuel rail at about 35 to 50 psi - you'll need a fuel pressure tester to check it (these testers are available as loaners from most major auto parts retailers.)

Injectors need to be opened and closed in sequence by the on-board computer - you'll need a Noid light to check (these are available for sale under $20 at the same stores)

However, if the engine doesn't start with starting fluid, then you'll need to check spark (should be strong with 12 KV or more) and compression (minimum of 125 psi on all cylinders).

Please check those things and let me know what you find so we can proceed.

Best Regards.