lat1687

Hi i just rebuilt my engine and everything is all pluged up and the engine just spins doesnt start but the engine is getting fuel and spark. I just dont know whats is wrong with my car, it ran fine before i rebuilt the engine. If there is anyone in CT that can help PM me or email at l67sc01@aol.com



thanks mike

eage8

iTrader: (9)

check your timing?

lat1687

I have the timing as close to what i can get it without the engine running??????

lat1687

If there is anyone in the Ct or NY area please if you think you can help me resond thanks

eage8

iTrader: (9)

I would try a compression test just to make sure the engine is good.

chwkrx7

make sure fuel lines aren't on backwards

arniez

Mostly Motorsports in Stratford CT does a pretty fair amount of work on RX7's. He put a Mazda rebuilt 13b in my car, did a nice job.
ArnieZ

Slowride R7

You might try the deflood , or pour oil into the housings to get the compression up.

trueimport

iTrader: (8)

You said that it’s getting fuel and spark but how are you sure of this? The reason I say that is because it sounds like it could only be one of 2 things either fuel or spark. If you say that it’s getting fuel then obviously the fuel lines aren’t crossed. There could be a slim chance that your Crank Angle Sensor went bad but very unlikely.

Start with the basics and work down the line. There are only a few components per each system that could fail so trace each one from start to finish. Example..... Start with the fuel pump and work that system all the way to the injector. The same goes for spark and so on. Just take your time and you’ll eventually work it out.

lat1687

I know that the car if getting fuel is that when i try to start it I can hear it build compression up and I can smell and see fuel coming out the down pipe. But while I crank it over sometime the engine will backfire or it makes this weird sound.

trueimport

iTrader: (8)

Stupid question but are you sure the spark plug wires are going to the correct coils?

Have you tried to deflood it?

lat1687

yeah Ive moved the plug wires a few times and Ive deflooded it too many times. But the fucked up part is that before i rebuilt the engine it ran perfect "knock on wood"

smokie

iTrader: (5)

check to see if you afm is plugged in that could be the case to if your afm is not plugged in then it want start up

lat1687

yes the afm is pluged in

trueimport

iTrader: (8)

Is the Crank Angle Sensor put in correctly? Is the AFM facing the right direction?

lat1687

yeah the CAS is put in right and the AFM can only go one way

trueimport

iTrader: (8)

Dude sorry but I just don’t know. Without seeing the car in person and actually hearing what its doing makes the diagnoses very hard. I'll give it some more thought and let you know if i come up with any more suggestions.

drakesword

Even if it has no compression it should do something. Disconnect the battery and use jumpers to connect to another running car. Have a friend rev the other car to bout 2k rpm while you crank. Hold the gas peddle down or pump it. If it tries to turn over or if the starter speeds up then you've got something. Just keep after it.

you say that the spark plugs are ok but just for the hell of it grab about 4 of each of the cheap kind of plug. They cost ~$5-$6 each.

Just a question, How long was the fuel sitting for the rebuild? Full or not full tank?

If worse comes to worse then grab a can of starter fluid, its hell on the o2 sensors but better then replacing a good engine. If she turns over on the starter fluid then its probably something wrong with your fuel delivery system (think pump, both filters, tps, injectors).

underboosted

if its fuel injected don't hold down the gas pedal that will make it harder to start. did you do the rebuild or did someone else? if spark and fuel and sensors are good are your clearances good or is the engine binding internally?

joeylyrech

iTrader: (11)

it does not have enough compression to start (that is way you see fuel coming out the downpipe)did you replace all the hard seals?new housings?if you used old ones and they were not in the best shape(scratches,chrome flacking,cracks around the spark plug area,ect.ect)it will take a while to build up enough comp to start by itself,get a fuel cut of switch and pour some oil into the chambers and give it a try,if it start let it run for around and hour or so do a comp and let us know the numbers

drakesword

It makes it harder to start IF the fuel system is primed and free of air bubbles. I had to do that after replacing the filters and fuel from the tank.

veedubbed

After I put a new motor in my old car, I had trouble getting it started the first time as well. Had to floor the gas and just keep on it, and eventually it started. It would die out at anything below 2,000 RPM's so I just let it idle there for a little bit and then it was fine after that.

Battle Cat

iTrader: (78)

does this apply to T2's aswell??

drakesword

Yes, The TII still needs the basics of an engine, Air Fuel and Fire. Just do as he said checking over the fuel system first, including injectors. Then once your done with the fuel system check the ignition. Pull a plug off and have a friend crank it. You should either see a spark (if the plug is touching the block) or an arc of electricity from the plug to a ground. Also make sure your getting ample air flow. For testing purposes and testing purposes only pull the filter out, Make sure all the ducts are clean, and crank it again. Don't let the engine run long without it though.