Friend's 7mge won't start, he moves soon, help.

Flateric

New Member
Mar 26, 2008
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Calgary, Alberta, Canada
Ok, here's the background on the car. It's a MKIII 7MGE. Originally he was just going to sell me this car really cheap. He has had it for over a year right now in it's current state.

It's original motor went on it and he swapped in a JDM 7MGE and everything appears to be where it should be. The problem is that the damn thing just will not start. It almost starts up, sorta sputters and coughs, fires a little bit then just keeps cranking.

We have changed out so far, off of my parts car here;
ECU, Ignitor/coil, distributor.

We have adjusted the timing and things of note regarding this are;
Won't fire or cough or sputter when timing is close to TDC. But when timing is way off retarded by like 15 or more it seems like it is closer to actually starting.

Other things of note;
The fuel pump relay doesn't seem to wanna come on with the key. It just doesn't get power to flip it on. It does however run when you jumper the FP to B+ in the service plug. I realize this is pointing to some type of wiring issue and I will be tracking this down on my next visit. But I think it should fire up if it's jumpered.

When the pump is jumpered to be on, the fuel rail sounds, well for lack of a better word, slushie. Like a liquidy noise in the front of the fuel rail near what I believe to be either the damper or the stock FPR.

The car is bone stock in all ways except for this JDM &MGE which is bone stock also.

If we can't get this car running it's going to be mine, but honestly I would rather help this guy get it going and allow him to continue to be a supra owner. It's just such a damn shame considering the car so nearly starts.

It is getting spark, it appears to be getting fuel. It almost starts but not quite.

Any help or suggestions would be greatly appreciated. Hopefully I can help this guy keep his car and get it going before he leaves.
 

AJ'S 88NA

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Jul 26, 2007
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Florida
Sounds more like timing to me. Have you checked to see that all the timing marks line up, #1 on TDC, rotor pointing at the #1 wire, cam gears on the marks, and the crank on the "0"?

Other things to check would be the AFM connection, the ECU grounds that connect to the intake manifold.
 

Flateric

New Member
Mar 26, 2008
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Calgary, Alberta, Canada
AJ'S 88NA;1431662 said:
Sounds more like timing to me. Have you checked to see that all the timing marks line up, #1 on TDC, rotor pointing at the #1 wire, cam gears on the marks, and the crank on the "0"?

Other things to check would be the AFM connection, the ECU grounds that connect to the intake manifold.

Ok, good suggestions, yes I did the timing mark check. Yes I checked the AFM connection.

But I have not yet checked the grounds between ECU and intake manifold. Good one, I'll check that for sure.

But please keep em coming guys, as I said there is limited time before he leaves.
 

AJ'S 88NA

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Jul 26, 2007
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Flateric;1431702 said:
Ok, good suggestions, yes I did the timing mark check. Yes I checked the AFM connection.

But I have not yet checked the grounds between ECU and intake manifold. Good one, I'll check that for sure.

But please keep em coming guys, as I said there is limited time before he leaves.

All the timing marks I was referring to, and you have to make sure the #1 piston is at TDC, check by putting a pencil in the spark plug hole and turning the crank by hand. Check the crank pulley and make sure the rubber islolator hasn't deterriated and has slipped.

BTW, any codes??
 

Flateric

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Mar 26, 2008
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Calgary, Alberta, Canada
Thats a good one I forgot, well no codes, but the check engine light just flashes constantly, with both ecu's. There is no pause or gaps in the flashes to seperate the numbers.

Just constant and consistant flashes.
 

cuel

Supramania Contributor
Jan 8, 2007
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Baytown, Texas
The fuel pump should act exactly as you describe. The afm turns it on when the flapper moves. You can pull the air filter, and push the flap open. This should activate the fuel pump(with the key on). Could be you have the dist. off a tooth, or the firing order wrong/backwards.