Complete jdm s5 swap I'n usdm s5 vert cranks no start
09-03-11, 09:53 PM
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Complete jdm s5 swap I'n usdm s5 vert cranks no start
Ok so I bought a jspec motor with complete harness wired it all up I have spark and fuel but it won't start I'm using all of the n370 units so I don't see a problem their does anyone have an idea what could be my problem here? But I am using a n374 ecu reflashed on redom might this be my problem?
09-03-11, 10:10 PM
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JDM engines have the fuel lines reversed to that of a USDM engine.Check to see that Fuel Flows from the Filter to Primaries then secondaries and out to return.
If you hook up in Reverse.(Say Filter to secondary rail) it will not start.
If you hook up in Reverse.(Say Filter to secondary rail) it will not start.
09-04-11, 03:20 PM
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I had to swap my lines when first starting my JDM 13B-T a few years ago. At first I didn't know that the fuel lines were arranged differently on the USDM and JDM engines. This fixed my starting issue.
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09-04-11, 05:59 PM
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+1 to what everyone has said. My jdm swap threw me for a brief loop because of the same thing, kicked myself when I remembered but there was that brief "hope I didn't just get screwed" feeling.
09-05-11, 11:29 PM
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Ok guys I switched the fuel lines and it sputtered like it wanted to start but now my rpms stop jumping after like 3seconds of cranking it.. It never did that before would that be a reson for it not to be startin now? Or should I do the pull start thing and see if it turns on?
09-06-11, 12:47 PM
#11
I'd do a compression test before chasing anything else. Our JDM Tii had a rusted front iron and the front rotor and seals where all a rusted mass. The TigerJapanese guy I talked to on the phone assured me that it was compression tested and had great compression. I wonder if he was somehow mistaken...
If the compression test fails nothing else matters. Here's a writeup on how to check if you havent already.
http://www.aaroncake.net/RX-7/blown.htm
If the compression test fails nothing else matters. Here's a writeup on how to check if you havent already.
http://www.aaroncake.net/RX-7/blown.htm
09-06-11, 02:44 PM
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Pull the plugs and see if they are wet.If they are then Chances are it flooded.
Dry them off,roll the engine over without the EGI fuse in,and expel fuel in the engine,Then Put everything back on and try it again.
Dry them off,roll the engine over without the EGI fuse in,and expel fuel in the engine,Then Put everything back on and try it again.
09-07-11, 04:22 AM
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Well I'm not new to the rotary motor this is why I'm stumped the motor has compression i know that for a fact just by listening to it with out the leading spark plugs I'n and cranking it it can be that it might be getting flooded since the plugs where pritty dam wet when i pulled them out the gas that was I'n the tank had been sitting I'n their for a while so im going to dump it out and put new gas and I'll see wut happeneds from their but the rpms stop jumping after like 3 seconds that's the part that i don't get i know it's has to do with the cas because that tells the coils when to spark but the weird thing is it just started doing this never did it before so I'm guessing it's going to be a wiring problem now -_- well I'll do some more work on the car tomorrow and I'll keep you guys posted thanks for all of the help guys
09-09-11, 05:25 PM
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Ok so i flushed out the old gas I'n the tank and put new gas i cranked it and it stared to jump as if it was about to start but it keeps flooding it self i remove the spark plugs and the egi fuse to unflood it and i wipe the spark plugs down put them back I'n and the fuse as well and it wants to start then it floods once again now I'm out of ideas.... Does anyone have a clue why it keeps flooding itself?
09-09-11, 05:39 PM
#15
I'd do a compression test before chasing anything else. Our JDM Tii had a rusted front iron and the front rotor and seals where all a rusted mass. The TigerJapanese guy I talked to on the phone assured me that it was compression tested and had great compression. I wonder if he was somehow mistaken...
If the compression test fails nothing else matters. Here's a writeup on how to check if you havent already.
http://www.aaroncake.net/RX-7/blown.htm
If the compression test fails nothing else matters. Here's a writeup on how to check if you havent already.
http://www.aaroncake.net/RX-7/blown.htm
unless they filled this motor with water AFTER it was compression tested just as yours.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/jdm-tigerjapanese-motor-948289/page2/
04-11-12, 07:06 PM
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ok well i pull started the car it decited to stay on for about a good min. the dies out and doesnt want to start anomore the motor does have compression it just wont turn on or when it does it just dies out hmmmm? i read up that the n374 ecu wont turn on the rear injectors if the car is not factory turbo is this true does any one have personal experiance with this?
04-12-12, 03:35 PM
#17
We dumped the 374 too because it wouldnt fire the back rotor. When we were researching it it seemed some 374s worked and some didnt.
RTek will hot rod the 374s but I dont know if it will make a "front only" 374 work or if it is only for the 374s that work. Or you can just get a 370.
When it was running were both rotors going?
RTek will hot rod the 374s but I dont know if it will make a "front only" 374 work or if it is only for the 374s that work. Or you can just get a 370.
When it was running were both rotors going?
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