Excessive black smoke

Aluminum · 08-02-2007, 07:52 PM

Hey guys,

I've noticed after I start my car there's lots of black smoke, but it goes away after about 10 minutes of driving.

What do you think is causing it?

TIA

rick2 · 08-02-2007, 10:27 PM

thats pretty common if you've got worn out/leaky injectors. Most common issue is the leaky injectors leak fuel into the housing while the engine is sitting off, so when you first fire it up, it s a bit rich/flooded.

Aluminum · 08-03-2007, 10:57 AM

Thanks..

So what's the best way to fix it, just replace the injectors?

brent_strong · 08-03-2007, 11:20 AM

Might want to try getting them cleaned. A local shop here will do it for ~$10/per. That includes new pintle caps, orings and flow sheets for them. If they are cracked or bad, they'll be able to tell you. They've been at it a while now and I don't think they've had a bad injector yet...so yours are probably fine.

New Era Performance

AZNPWR · 08-05-2007, 11:44 AM

Thanks for the link Brent, I need to send mine out to get redone.. they have been giving me trouble for a while, but I haven't gotten around to it.

I'll call them and see if they mind shipping back and forth.

Jimbo · 08-05-2007, 04:35 PM

Ya, I think these guys nailed it.. leaky injectors is almost always the culprit

Wantone · 08-05-2007, 09:45 PM

Good stuff!

RageRX7 · 08-06-2007, 04:21 PM

Looks like I'm not needed here.. I would have said the same thing..

Good luck

Aluminum · 08-06-2007, 04:44 PM

Thanks for the feedback guys.. much appreciated.

KevinRX7 · 08-16-2007, 06:35 PM

Were they right?

Aluminum · 08-23-2007, 10:41 AM

LOL they were right, got my injectors back and installed them, the thing runs like it's brand new.

Thanks alot for the help guys, you saved me some money and an anxiety attack at the same time!!

brent_strong · 08-23-2007, 11:44 AM

Awesome! I might be picking up a rotary FC for a friend, so I'll need to keep an eye on this. Apparently I'm going to play mechanic for him in order to get it into top-notch shape.

KevinRX7 · 08-23-2007, 09:37 PM

hahah sometimes it's good NOT to know what your doing isn't it?

brent_strong · 08-23-2007, 09:41 PM

Definitely! It'd be fun to mess with.

KevinRX7 · 08-23-2007, 09:45 PM

Surprised he trusts you now that's you've gone the way of the piston

brent_strong · 08-23-2007, 10:04 PM

Guess what other RX-7 he might buy rather than the FC.

I turn over cars wayyyy too often.

08-02-2007, 07:52 PM	#1 (permalink)
Aluminum Member Join Date: Jul 2007 Posts: 51	Excessive black smoke Hey guys, I've noticed after I start my car there's lots of black smoke, but it goes away after about 10 minutes of driving. What do you think is causing it? TIA

08-02-2007, 10:27 PM	#2 (permalink)
rick2 Senior Member Join Date: Jun 2007 Location: Henderson, NV Posts: 243	thats pretty common if you've got worn out/leaky injectors. Most common issue is the leaky injectors leak fuel into the housing while the engine is sitting off, so when you first fire it up, it s a bit rich/flooded. __________________ '87 Blue RX-7 Coupe - the race car '99 Green MX-5 Roadster - my daily '77 RX-3 SP - the project car

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08-03-2007, 10:57 AM	#3 (permalink)
Aluminum Member Join Date: Jul 2007 Posts: 51	Thanks.. So what's the best way to fix it, just replace the injectors?

08-03-2007, 11:20 AM	#4 (permalink)
brent_strong Senior Member Join Date: Jun 2007 Posts: 157	Might want to try getting them cleaned. A local shop here will do it for ~$10/per. That includes new pintle caps, orings and flow sheets for them. If they are cracked or bad, they'll be able to tell you. They've been at it a while now and I don't think they've had a bad injector yet...so yours are probably fine. New Era Performance

08-05-2007, 11:44 AM	#5 (permalink)
AZNPWR Member Join Date: Jun 2007 Posts: 52	Thanks for the link Brent, I need to send mine out to get redone.. they have been giving me trouble for a while, but I haven't gotten around to it. I'll call them and see if they mind shipping back and forth.

08-05-2007, 04:35 PM	#6 (permalink)
Jimbo Senior Member Join Date: May 2007 Location: Toronto Posts: 161	Ya, I think these guys nailed it.. leaky injectors is almost always the culprit

08-05-2007, 09:45 PM	#7 (permalink)
Wantone Senior Member Join Date: Aug 2007 Posts: 353	Good stuff!

08-06-2007, 04:21 PM	#8 (permalink)
RageRX7 Senior Member Join Date: Jun 2007 Posts: 164	Looks like I'm not needed here.. I would have said the same thing.. Good luck

08-06-2007, 04:44 PM	#9 (permalink)
Aluminum Member Join Date: Jul 2007 Posts: 51	Thanks for the feedback guys.. much appreciated.

08-16-2007, 06:35 PM	#10 (permalink)
KevinRX7 Senior Member Join Date: Jun 2007 Location: Bay Area Posts: 132	Were they right?

08-23-2007, 10:41 AM	#11 (permalink)
Aluminum Member Join Date: Jul 2007 Posts: 51	LOL they were right, got my injectors back and installed them, the thing runs like it's brand new. Thanks alot for the help guys, you saved me some money and an anxiety attack at the same time!!

08-23-2007, 11:44 AM	#12 (permalink)
brent_strong Senior Member Join Date: Jun 2007 Posts: 157	Awesome! I might be picking up a rotary FC for a friend, so I'll need to keep an eye on this. Apparently I'm going to play mechanic for him in order to get it into top-notch shape.

08-23-2007, 09:37 PM	#13 (permalink)
KevinRX7 Senior Member Join Date: Jun 2007 Location: Bay Area Posts: 132	hahah sometimes it's good NOT to know what your doing isn't it?

08-23-2007, 09:41 PM	#14 (permalink)
brent_strong Senior Member Join Date: Jun 2007 Posts: 157	Definitely! It'd be fun to mess with.

08-23-2007, 09:45 PM	#15 (permalink)
KevinRX7 Senior Member Join Date: Jun 2007 Location: Bay Area Posts: 132	Surprised he trusts you now that's you've gone the way of the piston

08-23-2007, 10:04 PM	#16 (permalink)
brent_strong Senior Member Join Date: Jun 2007 Posts: 157	Guess what other RX-7 he might buy rather than the FC. I turn over cars wayyyy too often.