My FC is chugging along (not good)

djmtsu · 09-27-2009, 03:01 PM

The injectors were in the engine when I bought the swap from Landers. I have access to new injectors at work (for cheap) so I might pick up a set.

I am going to borrow an AFM and see if that does anything. We will see. I was too busy today fixing the Jeep, so I will get to it this week when the wife is out of town.

V8? Pfft, that's for sell outs!

***TitaniumTT*** · 09-27-2009, 03:30 PM

If the car sat for a long periord of time my guess would be injectors. I've heard and been witness to cars that sat for months and the moisture that is inherent with todays soup they call gas sits in the injectors and corrodes them to the point of sticking. When cut open the corrosion looks like cocaine.

Whizbang · 09-27-2009, 03:34 PM

injectors do have some small parts in there. Doesnt have much room for foreign material. Hell rebuilt injectors really cant even sit too long before you can start seeing issues with them sticking.

djmtsu · 09-27-2009, 03:39 PM

All true. And after it sat all winter under the cover, condensation was trapped under it, and there was surface corrosion on some of the underhood bits. Like the turbo compressor housing, water pump housing, bov mount.

That is why I think something got corroded in the harness, and is keeping the injectors from firing, or the injectors themselves are to blame.

We will see. Thanks for the input guys!

rx7 FC TII · 09-29-2009, 09:46 AM

im having a very similar issue. im kinda stumped on what it is right now. it could be the AFM. thats what im thinking at this point.

does the crank angle do anything after start up? ive had a problem with that wire being loose on start up.

classicauto · 09-29-2009, 03:51 PM

Quote:

Originally Posted by TitaniumTT

If the car sat for a long periord of time my guess would be injectors. I've heard and been witness to cars that sat for months and the moisture that is inherent with todays soup they call gas sits in the injectors and corrodes them to the point of sticking. When cut open the corrosion looks like cocaine.

"Want to Buy:

old rotten injectors. Must be very corroded.
only pure columbian corrosion accepted
i'll pay whatever you want. Even BJ's"

Whizbang · 09-29-2009, 05:56 PM

Quote:

Originally Posted by rx7 FC TII

im having a very similar issue. im kinda stumped on what it is right now. it could be the AFM. thats what im thinking at this point.

does the crank angle do anything after start up? ive had a problem with that wire being loose on start up.

yea it does quite a bit after start up.

djmtsu · 09-29-2009, 08:55 PM

Quote:

Originally Posted by classicauto

"Want to Buy:

old rotten injectors. Must be very corroded.
only pure columbian corrosion accepted
i'll pay whatever you want. Even BJ's"

[Bob Saget]I've sucked dick for used injectors[/Bob Saget]

IH8DSM · 09-30-2009, 12:06 AM

So do I get to help tear apart a turbo motor?

***TitaniumTT*** · 09-30-2009, 06:45 AM

Quote:

Originally Posted by classicauto

"Want to Buy:

old rotten injectors. Must be very corroded.
only pure columbian corrosion accepted
i'll pay whatever you want. Even BJ's"

Hell man, pull your filler apart and if it's anything like mine you'll find plenty of it behind the flapper door. If you get creative you can figure out a way to extract it from the filter. That's where it always seems to land.

djmtsu · 09-30-2009, 07:42 AM

S5....no flapper, just a bullet plunger!

FC3S Murray · 10-01-2009, 07:21 AM

Fiveomotorsport.com

Good injectors for a cheap price. Siemen Dekas, Bosch, ect

They sell FC rx-7 specific milled injectors too!

djmtsu · 10-01-2009, 08:20 AM

Quote:

Originally Posted by FC3S Murray

Fiveomotorsport.com

Good injectors for a cheap price. Siemen Dekas, Bosch, ect

They sell FC rx-7 specific milled injectors too!

Pretty sure I can get stock injectors cheaper than anyone here

But, if it is injectors, I am getting 750cc's and an Rtek.

A quick question:

If it is the AFM, shouldn't the check engine light be on when the car is running? Because it is NOT.

djmtsu · 12-23-2009, 08:24 PM

Welcome back thread.

I need to get this thing running ASAP. I found something else, and I would like to get the most money out of it as possible. Or if that deal falls through, it needs to be tip top for DGRRX.

So, here is what I am going to do in order. Compression test is done, and its all good.
-replace AFM
-replace injectors
-replace harness
-replace ECU

While the UIM is off, I will inspect the LIM gasket and the o-rings a such on the injectors.

Everyone cross their fingers.

Max777 · 12-24-2009, 04:36 AM

you can test an afm for resistance. You can also do a test on the injectors you keep to check that they are witin specs.(requires injectors testor, not sure where to get it) I'm sure that you are aware of this, but some places like corksport do electrical harness rebuilds, althrough it's pricey. If you do end up going with this option, may I suggest the 2.0 rtek, or perhaps an Apexi power FC with banzai link connector? I think that this is simply worth its weight in gold if you need/want to replace your ecu anyway. It should (dont quote me) work like stock, and give you a lot more control of the engine.

Used Power FC's can be picked up for roughly the price of a new megasquirt unit, or you can go with a full standalone like a haltec in which case the harness would come with it. Seeing as how some sell for around 600, and a rebuilt hanress is around 800? that seems like a deal to me. Opinions?

09-27-2009, 03:01 PM	#31
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	The injectors were in the engine when I bought the swap from Landers. I have access to new injectors at work (for cheap) so I might pick up a set. I am going to borrow an AFM and see if that does anything. We will see. I was too busy today fixing the Jeep, so I will get to it this week when the wife is out of town. V8? Pfft, that's for sell outs! __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

09-27-2009, 03:30 PM	#32
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	If the car sat for a long periord of time my guess would be injectors. I've heard and been witness to cars that sat for months and the moisture that is inherent with todays soup they call gas sits in the injectors and corrodes them to the point of sticking. When cut open the corrosion looks like cocaine. __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

09-27-2009, 03:34 PM	#33
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp iTrader: (5) Posts: 3,190 Rep Power: 20	injectors do have some small parts in there. Doesnt have much room for foreign material. Hell rebuilt injectors really cant even sit too long before you can start seeing issues with them sticking. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

09-27-2009, 03:39 PM	#34
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	All true. And after it sat all winter under the cover, condensation was trapped under it, and there was surface corrosion on some of the underhood bits. Like the turbo compressor housing, water pump housing, bov mount. That is why I think something got corroded in the harness, and is keeping the injectors from firing, or the injectors themselves are to blame. We will see. Thanks for the input guys! __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

09-30-2009, 12:06 AM	#39
IH8DSM RCC Contributor Join Date: Mar 2008 iTrader: (0) Posts: 610 Rep Power: 17	So do I get to help tear apart a turbo motor? __________________ 85 rx7 gsl-se - AA tags/ never ending project will never run

09-30-2009, 07:42 AM	#41
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	S5....no flapper, just a bullet plunger! __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

10-01-2009, 07:21 AM	#42
FC3S Murray frustrated! Join Date: Apr 2009 Location: Montana iTrader: (3) Posts: 611 Rep Power: 16	Fiveomotorsport.com Good injectors for a cheap price. Siemen Dekas, Bosch, ect They sell FC rx-7 specific milled injectors too! __________________ Same pig, new soul Last edited by FC3S Murray; 10-01-2009 at 07:25 AM..

12-23-2009, 08:24 PM	#44
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	Welcome back thread. I need to get this thing running ASAP. I found something else, and I would like to get the most money out of it as possible. Or if that deal falls through, it needs to be tip top for DGRRX. So, here is what I am going to do in order. Compression test is done, and its all good. -replace AFM -replace injectors -replace harness -replace ECU While the UIM is off, I will inspect the LIM gasket and the o-rings a such on the injectors. Everyone cross their fingers. __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

12-24-2009, 04:36 AM	#45
Max777 Pirate Join Date: Mar 2008 Location: Central IL iTrader: (5) Posts: 1,323 Rep Power: 18	you can test an afm for resistance. You can also do a test on the injectors you keep to check that they are witin specs.(requires injectors testor, not sure where to get it) I'm sure that you are aware of this, but some places like corksport do electrical harness rebuilds, althrough it's pricey. If you do end up going with this option, may I suggest the 2.0 rtek, or perhaps an Apexi power FC with banzai link connector? I think that this is simply worth its weight in gold if you need/want to replace your ecu anyway. It should (dont quote me) work like stock, and give you a lot more control of the engine. Used Power FC's can be picked up for roughly the price of a new megasquirt unit, or you can go with a full standalone like a haltec in which case the harness would come with it. Seeing as how some sell for around 600, and a rebuilt hanress is around 800? that seems like a deal to me. Opinions? __________________ Rotaries:They are NOT that complicated! Last edited by Max777; 12-24-2009 at 04:40 AM..