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Ask Mike V. Your Own Question
Mike V.
Mike V., Auto Service Technician
Category: Ford
Satisfied Customers: 23815
Experience:  25 years experience on all makes and models, Licensed NYS Inspector.
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Won'tstart, 1997 ford f150 4.2 engine, 100,000, yes, Have

Customer Question

won'tstart
JA: What is the model/year of your Ford?
Customer: 1997 ford f150 4.2 engine
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: 100,000
JA: Are you fixing your F150 yourself? What have you tried so far?
Customer: yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: Have replaced the crank sensor ,replaced the cam sensor and goil
Submitted: 1 month ago.
Category: Ford
Expert:  Mike V. replied 1 month ago.

Hello and thank you for your question!
My name is ***** ***** I will be assisting you today.Please give me a moment to type my response. Thanks

Expert:  Mike V. replied 1 month ago.

Have you actually checked for spark?
Do you happen to know if there are any codes stored?

Customer: replied 1 month ago.
no spark
PO171
po174
replaced Crankshaft sensor and camshaft sensor and ignition coil
Expert:  Mike V. replied 1 month ago.

Ok

These two codes indicate a lean fuel mixture, nothing about a spark issue. I would like to have you try spraying some starting fluid directly into the throttle and see if it will fire for a few seconds on it. If it does, then I would check the fuel supply, these two codes together like this could indicate the fuel pump is failing on the truck. If the fuel pressure was low then you would get a lean fuel condition on both banks.

Since you have already taken care of the electrical side for spark please try this and let me know.

Thank you