87 n/a

djproffesork · 08-11-2009, 07:42 PM

Hopefully getting a 87 FC this week.(n/a)

Seller says its not getting fuel to the front rotor.

Any ideas on how to fix this?

Guy doesnt know if its mechanical or electrical.

NoDOHC · 08-11-2009, 08:41 PM

You should do a compression check to verify that it is truly fuel that is the issue. There is a good chance that the rotor is blown. (You can search for a procedure for the compression check).

If the compression is good on the front rotor (>60 psi if it has been sitting around) then the owner may be telling you the truth.

If the rear rotor is getting enough fuel to run, the fuel pump is not the issue. You can pull the upper intake (which takes some time on a stock RX7) and have a friend crank the car while you measure voltage across the plug to the front injector.

Please note that the car may start at first, but will quit quickly because the fuel pump will be off.

Obviously, if the compression is 0 psi there is no point in this proceding as you know that the engine would not run on the front rotor even if it was getting fuel (you are better off without fuel to that rotor)

djproffesork · 08-11-2009, 10:41 PM

You say better off without running fuel to that rotor.

Can it run safely and decent one a single rotor?

How easy would it be to replace?
Expensive?

RETed · 08-12-2009, 01:32 AM

Walk away from it...
Don't bother with projects like this is you have no idea what you're getting yourself into.
It could be that the engine is blown - do you know how to do a compression test?

-Ted

Max777 · 08-13-2009, 12:05 AM

ted speaks the truth! You should find a better example unless you are REALLY dedicated to fix it...

NoDOHC · 08-19-2009, 12:45 AM

Ted and Max have a valid point, if the engine is bad, you can probably find a better RX7 elsewhere.

If the body is good (no rust on the underbody) then the car may be a good candidate for an engine swap (either a replacement NA rotary, Turbo Rotary or piston engine).

The difficulty depends on how mechanical you are.

A reasonably mechanical person should be able to replace the engine in an RX7 pretty easily (you will run into cracked vacuum lines, fuel line, etc.)

If you are the adventuresome type, get a copy of the FSM and rebuild the old engine (you can get used-but-good parts for cheap on eBay).

08-11-2009, 07:42 PM	#1
djproffesork The Newbie Join Date: Aug 2009 iTrader: (0) Posts: 8 Rep Power: 0	87 n/a Hopefully getting a 87 FC this week.(n/a) Seller says its not getting fuel to the front rotor. Any ideas on how to fix this? Guy doesnt know if its mechanical or electrical.

08-11-2009, 08:41 PM	#2
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin iTrader: (1) Posts: 855 Rep Power: 17	You should do a compression check to verify that it is truly fuel that is the issue. There is a good chance that the rotor is blown. (You can search for a procedure for the compression check). If the compression is good on the front rotor (>60 psi if it has been sitting around) then the owner may be telling you the truth. If the rear rotor is getting enough fuel to run, the fuel pump is not the issue. You can pull the upper intake (which takes some time on a stock RX7) and have a friend crank the car while you measure voltage across the plug to the front injector. Please note that the car may start at first, but will quit quickly because the fuel pump will be off. Obviously, if the compression is 0 psi there is no point in this proceding as you know that the engine would not run on the front rotor even if it was getting fuel (you are better off without fuel to that rotor) __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

08-13-2009, 12:05 AM	#5
Max777 Pirate Join Date: Mar 2008 Location: Central IL iTrader: (5) Posts: 1,323 Rep Power: 18	ted speaks the truth! You should find a better example unless you are REALLY dedicated to fix it... __________________ Rotaries:They are NOT that complicated!

08-19-2009, 12:45 AM	#6
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin iTrader: (1) Posts: 855 Rep Power: 17	Ted and Max have a valid point, if the engine is bad, you can probably find a better RX7 elsewhere. If the body is good (no rust on the underbody) then the car may be a good candidate for an engine swap (either a replacement NA rotary, Turbo Rotary or piston engine). The difficulty depends on how mechanical you are. A reasonably mechanical person should be able to replace the engine in an RX7 pretty easily (you will run into cracked vacuum lines, fuel line, etc.) If you are the adventuresome type, get a copy of the FSM and rebuild the old engine (you can get used-but-good parts for cheap on eBay). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

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08-11-2009, 10:41 PM	#3
djproffesork The Newbie Join Date: Aug 2009 iTrader: (0) Posts: 8 Rep Power: 0	You say better off without running fuel to that rotor. Can it run safely and decent one a single rotor? How easy would it be to replace? Expensive?