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Matt, Engineer
Category: Chevy
Satisfied Customers: 21603
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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I installed a 03 Saturn 2.2 ecotec engine in a 06 Malibu. engine

Customer Question

I installed a 03 Saturn 2.2 ecotec engine in a 06 Malibu. engine will not start. The fuel rail is full of gas but the spark plugs are dry.
Submitted: 2 years ago.
Category: Chevy
Expert:  Matt replied 2 years ago.
1st check for spark by removing one of the spark plugs and plug it back into its coil and rest it on the metal of the engine ( DO NOT hold it on place by hand) then have your assistant turn the engine over whilst you watch the plug. It should give a fat blue spark at regular intervals.
If not then check that there's power to the coil pack using a meter. If there’s 12V at the pack but no spark then check the ECU power supply (fuse and relay) and also the connections to the crankshaft speed sensor.
If there is a spark and its still not starting then its likely that the ECU isn't opening the fuel injectors, if the injectors are working you can hear them click - its difficult to hear them with background noise so use a long screwdriver like a stethoscope, placing the handle end in your ear and the metal tip against the body of the injector whilst your assistant turns the engine over.
If you can't hear anything check the ECU power is present by measuring voltage at the fusebox and on its relay socket if OK then check the connections to the crank speed sensor and consider replacing this sensor if the wiring / connections look OK
If the car will start using a squirt of quick/ easi start into the intake then this confirms the problem is lack of fuel
Customer: replied 2 years ago.
We still can not get any firing. Checked fuses could not find the ecu fuse. It just will not
fire. Cranks and cranks. Both engines ran ???? Tŕuly stuck
Expert:  Matt replied 2 years ago.
are you getting spark or can you hear the injectors 'click'
Customer: replied 2 years ago.
No spark or clicking of enjectors.
Expert:  Matt replied 2 years ago.
in that case the next step is to check that the ECU / ECM has power
if you remove the underhood junciton box cover the fuses are labelled inside the cover
check that they are intact and use a voltmeter across the fuse terminals with the ignition on to test if there's 12V to the unit
Customer: replied 2 years ago.
Will do later this morning thanks
Expert:  Matt replied 2 years ago.
good luck