RX7 FD wont rev past 3k RPM!! - Page 4 - RX7Club.com - Mazda RX7 Forum

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RX7 FD wont rev past 3k RPM!!

Old 08-27-18, 01:51 PM
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Originally Posted by mikejokich View Post
Try Ari at Rotary Performance , now Reliable Performance, RX7.COM Performance and Repair Parts for RX-7 and RX-8.
Mike
Thanks Mike. Will check it out

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Old 08-27-18, 05:19 PM
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If you get desperate, I have a brand new in-the-box set of Mazda OEM injectors I squirreled away for a rainy day.
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Old 08-28-18, 11:38 AM
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Originally Posted by cymfc3s View Post
If you get desperate, I have a brand new in-the-box set of Mazda OEM injectors I squirreled away for a rainy day.
Thanks cymfc3s. I will drop you a DM if needed

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Old 08-29-18, 09:28 PM
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If you remove the omp on stock ecu it will go into limp mode
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Old 08-30-18, 07:32 AM
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Originally Posted by yourmom23 View Post
If you remove the omp on stock ecu it will go into limp mode
OMP connected and functioning.

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Old 09-20-18, 02:18 PM
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Hey guys,

Got the stock injectors finally. All the way from Japan and was a pain with USPS, but glad I finally got them. Will try to install them next week and then fire it up and see how it goes.

Cheers
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Old 10-03-18, 08:10 PM
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This is like a great Hitchcock movie. The suspense is killing me. �� Subscribed.
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Old 10-04-18, 07:12 AM
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Originally Posted by Boozer007 View Post
This is like a great Hitchcock movie. The suspense is killing me. �� Subscribed.

HAHAHA!! Thanks for subscribing Boozer007.

I plan to get the injectors installed this weekend, time has been scarce these past couple of weeks. Hopefully I will be back on the forum with good news.

Cheers
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Old 10-07-18, 03:49 PM
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Hey gents,

Update: Changed the injectors to brand new stock 550/850cc injectors. The car started and idled but still rough. I noticed that smoke was coming out the exhaust after I shut the car off. (See pic in next post.)

Does this sound like too much fuel? Even after the correct injectors are now in?

The next step would be to install the Power FC and go from there.

Are there any suggestions?

Thanks for the help guys. Appreciated as always.

Cheers

Last edited by Trinityevo13; 10-07-18 at 03:56 PM.
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Old 10-07-18, 03:55 PM
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Old 10-07-18, 03:58 PM
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Also noticed this. DP to mid pipe connection. It was soaked. Not sure if it was from the previous flooding issue with the large injectors. But that can't be good 🤦
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Old 10-07-18, 04:38 PM
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Originally Posted by Trinityevo13 View Post
Also noticed this. DP to mid pipe connection. It was soaked. Not sure if it was from the previous flooding issue with the large injectors. But that can't be good 🤦
Looks like oil, not gas. Gas would not stay that wet looking.
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Old 10-07-18, 04:42 PM
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Originally Posted by DaveW View Post
Looks like oil, not gas. Gas would not stay that wet looking.
True, good point DaveW. Now if this is oil, how is oil getting into the exhaust 😳🤦

OMP?

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Old 10-08-18, 03:07 PM
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First off, that has to be the RUSTIEST main cat I've ever seen.

Running rough - was it running rough for a bit and you shut it down, or it ran rough for a long time and the engine warmed up? Could just be a fouled plug from short starts/troubleshooting.

Dale
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Old 10-08-18, 03:16 PM
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Originally Posted by DaleClark View Post
First off, that has to be the RUSTIEST main cat I've ever seen.

Running rough - was it running rough for a bit and you shut it down, or it ran rough for a long time and the engine warmed up? Could just be a fouled plug from short starts/troubleshooting.

Dale
Thanks Dale. The rust is from the stock heat shield and its mainly on the down pipe. Definitely plan to change in the near future lol. I actually had a DP but it couldn't work because it was getting caught up in the steering shaft, so had to resort to what was available. I assure you the insides are all good!!

It ran rough for a short time and I shut it off. It did not warm up at all, I doubt it would have anyway. I will check the plugs for sure, just ran out of time this past weekend. Maybe I will try clearing it out as well - fuel pump disconnect and pedal to the floor and cranking it over.

Thanks for your input Dale.

Cheers
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Old 10-09-18, 11:29 AM
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not trying to jump to conclusions but i had a very similar problem.... i would try a compression check. Unfortunately for me the back rotor has none
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Old 10-09-18, 11:51 AM
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Originally Posted by tjdj009 View Post
not trying to jump to conclusions but i had a very similar problem.... i would try a compression check. Unfortunately for me the back rotor has none
Thanks tjdj009, at this point it cant hurt to do a compression check. I will do one when I get the chance. Need to borrow the compression tester equipment.

Cheers
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Old 10-09-18, 11:29 PM
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Originally Posted by Trinityevo13 View Post
Thanks tjdj009, at this point it cant hurt to do a compression check. I will do one when I get the chance. Need to borrow the compression tester equipment.

Cheers
not sure where your from but autozone in some places will let you “rent” one for free
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Old 10-19-18, 10:22 PM
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Any updates? Hope we get this sorted out for you soon. Got any pictures of the front coil triggers?
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Old 10-30-18, 11:25 AM
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bumping some one else's thread cause i had the same problem and now i have no motor sooo tryina figure it out soon
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Old 11-01-18, 09:36 PM
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JUst had the same problem, with my 7. Not wanting to rev past 3500. Horrible break up , spurting. Looking at every system, ignition coils, fuel injectors, wringing. Check your crank sensors to crank wheel clearance. Mine where off spec. And when I changed them and got them to spec , it solved my problem. Full free reving , no more break up. Weight off my chest!! Thank you BANZAI!!
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Old 11-17-18, 04:48 PM
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Originally Posted by Trinityevo13 View Post
Thanks tjdj009, at this point it cant hurt to do a compression check. I will do one when I get the chance. Need to borrow the compression tester equipment.

Cheers
Ok some update. I did a compression check. All seems fine. Rear rotor: 97 psi and front rotor: 110psi.
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Old 11-17-18, 04:49 PM
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Originally Posted by the one View Post
JUst had the same problem, with my 7. Not wanting to rev past 3500. Horrible break up , spurting. Looking at every system, ignition coils, fuel injectors, wringing. Check your crank sensors to crank wheel clearance. Mine where off spec. And when I changed them and got them to spec , it solved my problem. Full free reving , no more break up. Weight off my chest!! Thank you BANZAI!!
Thanks, I will check the clearance on it. Know the clearance acceptable? Sry for the late reply didn't get any updates through email that the post was updated

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Old 11-17-18, 05:09 PM
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Sorry for the bad angle and quality. But that's how the crank sensor looks. I will have to get a fielder gauge on it to measure the clearance.

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Old 11-17-18, 10:07 PM
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Hey guys,

Does anyone know where I can get connector plugs to the ECU? I pulled the connectors from the ECU so many times they aren't holding up too well. I plan to rewire some or all of the harness.

Cheers
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