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Zetec engine start first time


Guest Ophidr

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A pop from the exhaust means burning fuel in the exhaust. No more. Flame has to come from one of the cylinders. Confirms you have sparks and fuel. No more than that.

I suggest you go back to basics and recheck the wiring of the supply to the coil. Try and confirm which is the trigger wire from ECU to coil 1. Confirm plug leads 1 & 4 are on that side of the coil. Confirm the 12v supply is on pin two the middle of the plug.

Find TDC for cylinder 1 with a screwdriver down its plughole. Make a pointer the almost touches the crank pulley and mark pointer and pulley with tippex. Now you can use a strobe to confirm you have ignition at roughly the right position.

Check your TPS or MAP/MAF is calibrated in your ECU map. Check fuel pressure if you can. Make sure your ECU map knows what fuel pressure and injectors it is running or correct these figures if they are wrong. Balance the throttle bodies by eye.

If it still won't run then you need a visit from someone who knows Emerald

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The p&p loom is bench tested before going to GBS so unless you have worked on anything it should work. That said the loom terminals can pull off wires if the pulgs are jarred during fitting.

More likely something you have touched is not quite right, same as others have said, back to basics.

TPS wiring, on the ATR the TPS is not, or wasn't P&P, check the wiring, it is easy to get wrong. https://www.dropbox.com/s/20z02p6f5bbl8dl/TPS plug.pdf?dl=0

I think someone has already mentioned the crank sensor change if the engine was originally auto, flywheel bolt pattern is off set so should only be possible to fit one way.

Coil pack to plugs as discussed by others, as previously mentioned the Zetec plugs are prone to fouling.

TPS calibration, also check that the TPS reading rises smoothly as you operate the throttle. A reverse reading, or a stepped readout can mean wiring issues or a faulty TPS.

Second the throttle basic set up, the ATR's are not calibrated from factory, so you must check as I mentioned in previous post, I can post the ATR setup procedure but it needs the engine running first.

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Give it a shot of easy start down cylinder one and then try to start it, then repeat in turn for the other cylinders . This will tell you if the spark on each cylinder will actually fire the mixture and might confirm the thought that only 1 and 2 are working

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Just looking at your map that we downloaded and in the ignition configuration (ECU config / ignition output) it seems to be set up for a distributor not wasted spark.

Also, if you switch to wasted spark, it says ignition driver 1 is pin 25 and ignition driver 2 is actually pin 5 not pins 2 as shown in the Emerald information.

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