Troubleshooting 87 RX7

D

Dexter

Banned

Contributor

• Feb 29, 2004

• #1

hey, im posting this up for my friend with an 87 N/A RX7.

sometimes the engine floods and will not start unless you pull one of the fuel fuses ( i cant remember if he said injector or pump).

when the engine does finally start, it sounds like a go kart with really rough idle and he says he can only go about 20 mph.

he replaced the spark plugs and wires hoping to fix the problem, but no luck.

does anyone have any ideas what could be causing this?

 

B

BinaryRotary

Member

:

03 MSP, 85 RX-7 GS, 90 RX-7 TII

• Feb 29, 2004

• #2

Try replacing all the ground wires.

 

D

Dexter

Banned

Contributor

• Feb 29, 2004

• #3

So you think its an electrical gremlin? thanks for the idea

 

B

BinaryRotary

Member

:

03 MSP, 85 RX-7 GS, 90 RX-7 TII

• Mar 1, 2004

• #4

Oh yeah man. The FC's are NOTORIOUS for electrical problems.

 

M

Mint87RX7

Member

:

87 RX7

• Mar 11, 2004

• #5

is he putting the fuse back in before starting? pulling it out will unflood it but it needs to be in to get fuel to the engine once it starts

 

D

Dexter

Banned

Contributor

• Mar 12, 2004

• #6

Mint87RX7 said:

is he putting the fuse back in before starting? pulling it out will unflood it but it needs to be in to get fuel to the engine once it starts

Click to expand...

yeah...

once unflodded the engine will start, just runs like ass.

not timing or spark...gotta be fuel. somethin.

 

B

BinaryRotary

Member

:

03 MSP, 85 RX-7 GS, 90 RX-7 TII

• Mar 12, 2004

• #7

Try some ATF fluid, is the compression good?

 

D

Dexter

Banned

Contributor

• Mar 12, 2004

• #8

ATF fluid where? its a manual.

compression is fine, i dont remember the numbers, but he said it was fine.

 

F

FC3s Boy

Member

:

2006 forester XT, 95 eclipse 03 protege5

• Mar 12, 2004

• #9

it could be one of many things , timing is way off, fuel filter is cloged, hooked up the spark plug wires wrong, you use atf in the motor to get the comp. up-

 

Mazdaspeedgirl

Resident Autocrosser

:

99 10AE MX-5 | 2016.5 CX-5 GT

• Mar 17, 2004

• #10

Update Dexx...

 

B

BlkZoomZoom

Member

Contributor

:

Hemi Ram, 71 Plymth Scamp, 71 Plymth Duster 340, 69 Dart 340/4sp

• Mar 19, 2004

• #11

10 bux. says its the fuel injector resistor pack. Mine did the same thing one day on the way home from work. I thought at first it lost compression, it sounded like it was running on one rotor. One of the old guys at work told me to try it (he had a couple lying around) sure enough he was right.

 

C

Captain KRM P5

Member

Contributor

:

2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P

• Mar 20, 2004

• #12

Mazda dealer says the engine is bad. The students at the local tech school poured brake cleaner in the throttle body in an attempt to fire it up - Dex and I thought carb cleaner was the trick....so whats with the brake cleaner? now the engine is seized. what would it take (parts and $ wise) to rebuild the engine? would it be better to just replace the engine altogether?

 

C

chinaman

• Mar 20, 2004

• #13

Brake cleaner? (stooges)

 

C

Captain KRM P5

Member

Contributor

:

2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P

• Mar 20, 2004

• #14

chinaman said:

Brake cleaner? (stooges)

Click to expand...

yeah....exactly....any thoughts?

 

C

chinaman

• Mar 20, 2004

• #15

www.rx7club.com ? Actually, there might be some kind of brake cleaner treatment, but I hope they looked up the proper procedure. In some cases, people unfreeze seized motors by pouring in ATF into the spark plugs holes and letting it sit for a day.

http://www.aaroncake.net/RX-7/atftrick.htm

 

I

iNeedSpeed

Member

:

titanium msp & silver fc3

• Mar 20, 2004

• #16

chinaman said it right. use a funnel or something to pour atf into the rotor housings....let sit for 24 hours..then manually turn the eccentric shaft about 1/3 of the way with a wrench.....repeat atf trick for the next rotor chamber and so forth until all three have been done. then make sure to change the plugs and oil after it has been started.

 

B

BinaryRotary

Member

:

03 MSP, 85 RX-7 GS, 90 RX-7 TII

• Mar 31, 2004

• #17

Heres a link for what you should do -

http://www.mazspeed.com/atf.htm