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Not start after engine swap. Everything looks fine no

Not start after engine...

Not start after engine swap

Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded?

Yes everything looks fine no corroded it cranks but doesn't start

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

6i and 2007 I switch it with a 2008

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

Yea I tried putting a new battery in And replacing the crank sensor

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

Engine light is on and my key won't lock or unlock the doors

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Answered in 3 minutes by:
9/22/2017
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Mazda
Satisfied Customers: 5,642
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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Customer reply replied 10 months ago
Alright

Hey how are you

so it will not crank over correct ?

is there power to starter solenoid (12 volts) ,with ignition switch in the start position ?

did you had to unplug ecm when you did the swap ?

did you check the ground cable at starter ?

do you have a capable scanner to read fault codes ?

what was issue prior to engine swap why was it swapped ?

is there a security light on or flashing ?

did use a scanner to clear all faults in all modules ?

what type scanner you have

lets start here & we go from there

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

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Customer reply replied 10 months ago
Right it cranks but doesn't start. I swap it with a different engine because the one before I believed the crank or something else blow It won't go more then 20 mph. its getting 12 volts no I didn't unplug the ecu before swap. I don't have a scanner . There is red key inside car flashing all the time

ok lets do this ,you might get lucky

Master reset Procedure

1- Disconnect Battery Cables ( Negative & Positive Cables )you can use any electrical wire as an extension if battery cables don't reach .

2- Hold cables Together for 60 secs ,then let go

3- Wait 30 minutes

4- Make sure all doors are closed

5- Reconnect battery Cables

6- Lock & unlock the vehicles using the key from driver door side (if you have a key fob with no blade key, just lock & unlock using the key fob buttons)

7- Enter the vehicle and attempt to start

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

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Customer reply replied 10 months ago
OK I try it

ok sounds let me know

chad

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Customer reply replied 10 months ago
I tried it and nothing
Customer reply replied 10 months ago
Also there is no spark to any of the spark plugs
Customer reply replied 10 months ago
I forgot to add that

did you have any plugs on harness between 07 and 08 on engine were different or etc ?

no spark ,on coils what are we missing power or ground ? ckp installed ,did you check ?

does it have power on it

do you hear fuel pump buzzing when you turn switch from off to on to prime fuel rail

what is vin# ***** me look the wiring circuit so we can follow it

v6 3.0or 4cyl 2.3 ?

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Customer reply replied 10 months ago
Yea they was different brand sparks plugs other then that they were the same.harness its a 2.3. the fuel rail is getting gas done check that. what's the ckp?
Customer reply replied 10 months ago
I can hear the fuel pump
Customer reply replied 10 months ago
Were is the vin# ***** at?
Customer reply replied 10 months ago
Also my key buttons will not lock or unlock the car

crank shaft position sensor

CLICK ON LINK TO VIEW PDF FILE LOCATION & R &R

REMOVE & REPLACE

oh no , why ecu swap , they did not match

the ecu will need programing to car that is your problem now

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Customer reply replied 10 months ago
Its not the ecu from the new engine so u think this could be my problem?

vin number is ***** the door frame ,on the driver side end of the dash ,look thru outside windshield in

the ecu needs to have car vin # registered and key syn to it or it will not allow start up unfortunate and you will need dealer scanner or equivalent to do

but if you only swapping engine why swapping ecu you can noit with out programing

reinstall old ecu i,it should work ,unless u saying u tried 2nd ecu and also same issue

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the ecu in your car that was originally in it before engine swap is what you need to use only

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if you only swapping engine then no ecu necessary and will not start

so go back to original and then see what you are missing if it did not start fuel or spark we need both to start .but off course original ecu it is synced to car

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Customer reply replied 10 months ago
I never changed the ecu the guy I got the engine from said I shouldnt have to
Customer reply replied 10 months ago
But I told if I get the ecu from the car I got the engine from it will start
Customer reply replied 10 months ago
I was told**

he is correct no need if only replacing engine ,, i thought u said you and ur dad did !u lost me there .lol

not true , on the ecu from other car , unless u change the key and ignition cylinder and security module etc ..

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Customer reply replied 10 months ago
Oh sorry for the confusion. My dad and me put the engine in the car. The engine had everything on it we just dropped it in and hook everything up
Customer reply replied 10 months ago
My vin# ***** *****

ok , go back with oem ecu and check the ckp sensor or replaced ,if you missing spark,as long you confirm the anti theft is not triggered ?

also next step will be having scanned to get fault codes to pull up pin point test and be accurate ,u can post them back here for me & i can help further on it

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Customer reply replied 10 months ago
OK thanks I'll do that I let u know what I come up with

sounds good read below how to get back in touch

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Chad Farhat
ASE Certified Technician

Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Mazda
Satisfied Customers: 5,642
Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
Verified
Chad Farhat and 87 other Mazda Specialists are ready to help you
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Customer reply replied 10 months ago
my key battery is dead could that cause it not to work?

yes off course

replace it

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replace it then redo the master reset

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Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Mazda
Satisfied Customers: 5,642
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Experience: Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles

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