bad smoking problem

89tpgt · March 19th, 2002, 10:35 AM

I have an 89 probe gt. I recently rebuilt the engine back all stock. The problem I have is recently the car started smoking. It only smokes when I let off the gas and the engine has backpressure on it, and it smokes a little when I first pull out. The smoke is kinda blue, but at the same time it looks sorda brown and smells like baked oil. I just finished putting a rebuilt stock turbo on the car today and it still does the same thing. Any help would be appreciated.

Ryanpzz · March 19th, 2002, 07:18 PM

Did you clean out the intercooler piping when you put the new turbo on? If not the engine could still be ingesting oil through the intake.

Other possibilities are bad rings and/or bad valve seals.

Cyress90PLX · March 20th, 2002, 12:32 PM

I would put either "the patch" or nicotine gum in the intake manifold

Cyress

TexasMX6GT · March 21st, 2002, 05:08 AM

I would think rings, I had the same symptoms after MY rebuild, and it turned out to be the rings never seated. Are you having a hard time getting the engine to start? Is the idle smooth, or is it kinda rough? I had both of those symptoms as well, might help you pinpoint the problem.

89tpgt · March 21st, 2002, 08:55 AM

Thank you for all your help. I think it might be the rings also. I pulled the #4 spark plug and the electrode was gone, it didnt look like anything hit it just detonation. The cause of this was my dad put 87 octane in the car with 12lbs. of boost and the car detonated alot. I will do a compression check today and post the outcome. I think that #4 is hurt, although the car still pulls very hard. Thanks for your help.

NBProbe · March 21st, 2002, 09:08 AM

I would say it is probably the rings. There's a chance that it could very likely be the valve seals too. Did you replace those when you rebuilt the engine? If you do a compression test do a leak down test too. This should tell you if it's the rings or not.

TexasMX6GT · March 21st, 2002, 10:38 AM

It's funny, I had shitty compression in my motor, and it still pulled SO HARD... I wonder how it would have done with good compression??

NBProbe · March 21st, 2002, 05:23 PM

Quote:

Originally posted by TexasMX6GT
It's funny, I had shitty compression in my motor, and it still pulled SO HARD... I wonder how it would have done with good compression??

I soooooo know how you feel!

I never did get a compression test done before I tore apart my engine but even with the spark plarks in, I could turn the engine by hand!!! :o

probemangt · March 21st, 2002, 08:20 PM

If I remember right my compression was 187 182 187 182 or something close to that. Is that Good? (I have well over 220,000 miles on my 89PGT).

probe this · March 21st, 2002, 10:29 PM

Quote:

Originally posted by probemangt
If I remember right my compression was 187 182 187 182 or something close to that. Is that Good? (I have well over 220,000 miles on my 89PGT).

Holy cow.

I hope you're remembering wrong. With our motors the max you could get is 160, and as long as all 4 are within 25% of each other that is good. Most get about 150 when they do a compression test. Make sure to hold the gas pedal while you do the test, and make sure you turn the same amount of turns for each cylinder. I hope you meant to say 147 142 147 142

vin192583745123 · March 22nd, 2002, 01:27 AM

to do a compression test you keep turning the car over until the tester dosent go any higher
mine was 170 170 170 170 and why would you have to press the gas pedal down id really like to know

89tpgt · March 22nd, 2002, 08:38 AM

OK guys I did a compression check yesterday. 127-130-128-131 Although when I pulled the #4 spark plug it had a little oil on it. I now dont think its the rings, I'm thinking valve seals. Anyways thanks for the help guys.

probe this · March 22nd, 2002, 09:47 AM

I'm not sure why you have to hold the gas pedal down. Most cars you don't have to. If you do the test and all of your numbers come up as 90s range, then you hold the gas pedal down. That usally fixes it. I had to do this once, not really sure why it didn't work.

Hey vin what kind of car do you have that you have that much compression? Do you have a gl or something?

vin192583745123 · March 23rd, 2002, 01:34 AM

yeah i have a 1990 GL

an 89tpgt what band valve seal did you use when you did a rebuild id like to know that to

probemangt · March 23rd, 2002, 05:49 PM

I checked where I wrote it down as I did each one. It was 187 182 187 182.

Why is this bad?
Why would I have higher compression then most?
Would that make something wrong?
It runs great, and doesn't smoke a bit. I figured the numbers had to be good.

vin192583745123 · March 23rd, 2002, 06:28 PM

your compression is great that is the last thing you should worry about

8-)

TexasMX6GT · March 23rd, 2002, 06:40 PM

I don't understand how the numbers could be that high, the turbo engine is low compression. But, if you're not detonating, then those numbers are fantastic, that's more power for you.

89tpgt · March 23rd, 2002, 10:00 PM

vin192583745123

I used fel-pro valve seals

probemangt · March 23rd, 2002, 10:26 PM

I just found something out from the guy I bought the car from.
What he said was he had the engine rebuilt and bored a little about a year before I bought the car. It sat for about 6 months before I bought it, (tranny was all screwed up). He didn't say how much it was bored, but could this be the reason for the higher compression results?

Nocooler · March 24th, 2002, 08:02 AM

Blue smoke on decel sounds like a bad turbo to me. The exhaust seal is probably bad. Rings and valves usually smoke all the time or until the car is warmed up.
HTH
Jeremy

89tpgt · March 24th, 2002, 08:46 AM

I changed the turbo and it does the same thing. The only thing is that when I went to do a compression check the #4 spark plug had a light oil coating on it. The compression check out ok. I'am still unsure of why the #4 spark plug was coated with oil. Im thinking valve seals or something of that nature. The car smokes when I first pull out and when I'am decelerating and tap the gas. Also the car smokes a little when I come to a complete stop. Thanks for the help guys.

FallGuy · March 26th, 2002, 06:33 AM

Most likely it's the valve stem seals. I just replaced one piston, rod bearings and rings in my mx-6 and it does the same thing. My probe did this as well and it turned out to be valve stem seals. They were hard like plastic when removed.
Good luck!

March 19th, 2002, 10:35 AM	#1
89tpgt Jr. Member Join Date: Nov 2000 Location: Kingsport, Tennessee U.S. Age: 34 Posts: 134	bad smoking problem I have an 89 probe gt. I recently rebuilt the engine back all stock. The problem I have is recently the car started smoking. It only smokes when I let off the gas and the engine has backpressure on it, and it smokes a little when I first pull out. The smoke is kinda blue, but at the same time it looks sorda brown and smells like baked oil. I just finished putting a rebuilt stock turbo on the car today and it still does the same thing. Any help would be appreciated.

March 21st, 2002, 09:08 AM	#6
NBProbe PT Know it All Join Date: Feb 2000 Location: In a House Age: 38 Posts: 4,192	I would say it is probably the rings. There's a chance that it could very likely be the valve seals too. Did you replace those when you rebuilt the engine? If you do a compression test do a leak down test too. This should tell you if it's the rings or not. __________________ Hoser Shane "No Ken, I don't work at the Gap"

March 21st, 2002, 10:38 AM	#7
TexasMX6GT Donating User Join Date: Jul 2000 Location: Borger, TX Age: 40 Posts: 1,598	It's funny, I had shitty compression in my motor, and it still pulled SO HARD... I wonder how it would have done with good compression?? __________________ 1990 Probe LX - Daily beater

March 22nd, 2002, 09:47 AM	#13
probe this Senior Member Join Date: Apr 2000 Location: Bismarck, ND Age: 36 Posts: 3,467	I'm not sure why you have to hold the gas pedal down. Most cars you don't have to. If you do the test and all of your numbers come up as 90s range, then you hold the gas pedal down. That usally fixes it. I had to do this once, not really sure why it didn't work. Hey vin what kind of car do you have that you have that much compression? Do you have a gl or something? __________________ Black 99 F150 Lightning with a 2.3L Kenne Bell and extras 465whp/ 593ft/lbs 12.786@104.495 Black 91pgt 12.02@108mph, 12.04@115mph 12.06@119mph 350.6hp 425.6ft/lbs Best 1/8th 7.81@94.79mph

March 23rd, 2002, 06:40 PM	#17
TexasMX6GT Donating User Join Date: Jul 2000 Location: Borger, TX Age: 40 Posts: 1,598	I don't understand how the numbers could be that high, the turbo engine is low compression. But, if you're not detonating, then those numbers are fantastic, that's more power for you. __________________ 1990 Probe LX - Daily beater

March 19th, 2002, 07:18 PM	#2
Ryanpzz MegaSquirtPzz Join Date: Jan 2001 Location: Somewhere Different Than Before Age: 36 Posts: 2,907	Did you clean out the intercooler piping when you put the new turbo on? If not the engine could still be ingesting oil through the intake. Other possibilities are bad rings and/or bad valve seals.

March 20th, 2002, 12:32 PM	#3
Cyress90PLX Guest Join Date: Sep 2001 Location: Lancaster,PA Posts: 1,462	I would put either "the patch" or nicotine gum in the intake manifold Cyress

March 21st, 2002, 05:08 AM	#4
TexasMX6GT Donating User Join Date: Jul 2000 Location: Borger, TX Age: 40 Posts: 1,598	I would think rings, I had the same symptoms after MY rebuild, and it turned out to be the rings never seated. Are you having a hard time getting the engine to start? Is the idle smooth, or is it kinda rough? I had both of those symptoms as well, might help you pinpoint the problem. __________________ 1990 Probe LX - Daily beater

March 21st, 2002, 08:55 AM	#5
89tpgt Jr. Member Join Date: Nov 2000 Location: Kingsport, Tennessee U.S. Age: 34 Posts: 134	Thank you for all your help. I think it might be the rings also. I pulled the #4 spark plug and the electrode was gone, it didnt look like anything hit it just detonation. The cause of this was my dad put 87 octane in the car with 12lbs. of boost and the car detonated alot. I will do a compression check today and post the outcome. I think that #4 is hurt, although the car still pulls very hard. Thanks for your help.

March 21st, 2002, 08:20 PM	#9
probemangt Guest Join Date: Jan 2001 Location: Waterville, Maine USA Posts: 971	If I remember right my compression was 187 182 187 182 or something close to that. Is that Good? (I have well over 220,000 miles on my 89PGT).

March 22nd, 2002, 01:27 AM	#11
vin192583745123 Guest Join Date: Dec 2001 Location: Connecticut Posts: 541	to do a compression test you keep turning the car over until the tester dosent go any higher mine was 170 170 170 170 and why would you have to press the gas pedal down id really like to know

March 22nd, 2002, 08:38 AM	#12
89tpgt Jr. Member Join Date: Nov 2000 Location: Kingsport, Tennessee U.S. Age: 34 Posts: 134	OK guys I did a compression check yesterday. 127-130-128-131 Although when I pulled the #4 spark plug it had a little oil on it. I now dont think its the rings, I'm thinking valve seals. Anyways thanks for the help guys.

March 23rd, 2002, 01:34 AM	#14
vin192583745123 Guest Join Date: Dec 2001 Location: Connecticut Posts: 541	yeah i have a 1990 GL an 89tpgt what band valve seal did you use when you did a rebuild id like to know that to

March 23rd, 2002, 05:49 PM	#15
probemangt Guest Join Date: Jan 2001 Location: Waterville, Maine USA Posts: 971	I checked where I wrote it down as I did each one. It was 187 182 187 182. Why is this bad? Why would I have higher compression then most? Would that make something wrong? It runs great, and doesn't smoke a bit. I figured the numbers had to be good.

March 23rd, 2002, 06:28 PM	#16
vin192583745123 Guest Join Date: Dec 2001 Location: Connecticut Posts: 541	your compression is great that is the last thing you should worry about 8-)

March 23rd, 2002, 10:00 PM	#18
89tpgt Jr. Member Join Date: Nov 2000 Location: Kingsport, Tennessee U.S. Age: 34 Posts: 134	vin192583745123 I used fel-pro valve seals

March 23rd, 2002, 10:26 PM	#19
probemangt Guest Join Date: Jan 2001 Location: Waterville, Maine USA Posts: 971	I just found something out from the guy I bought the car from. What he said was he had the engine rebuilt and bored a little about a year before I bought the car. It sat for about 6 months before I bought it, (tranny was all screwed up). He didn't say how much it was bored, but could this be the reason for the higher compression results?

March 24th, 2002, 08:02 AM	#20
Nocooler Member Join Date: Oct 2001 Location: St. Louis Michigan Posts: 364	Blue smoke on decel sounds like a bad turbo to me. The exhaust seal is probably bad. Rings and valves usually smoke all the time or until the car is warmed up. HTH Jeremy __________________ my email address is NOT working

March 24th, 2002, 08:46 AM	#21
89tpgt Jr. Member Join Date: Nov 2000 Location: Kingsport, Tennessee U.S. Age: 34 Posts: 134	I changed the turbo and it does the same thing. The only thing is that when I went to do a compression check the #4 spark plug had a light oil coating on it. The compression check out ok. I'am still unsure of why the #4 spark plug was coated with oil. Im thinking valve seals or something of that nature. The car smokes when I first pull out and when I'am decelerating and tap the gas. Also the car smokes a little when I come to a complete stop. Thanks for the help guys.

March 26th, 2002, 06:33 AM	#22
FallGuy Supercharged Member Join Date: Feb 2001 Location: Fargo,ND,USA Age: 48 Posts: 1,102	Most likely it's the valve stem seals. I just replaced one piston, rod bearings and rings in my mx-6 and it does the same thing. My probe did this as well and it turned out to be valve stem seals. They were hard like plastic when removed. Good luck! __________________ 8.13@170mph BWS480 at 38psi Nitrous to spool only! Best 60ft 1.17 1100whp Best mph in 1/4 170mph 1st RWD 2jz Powered Probe - FOYOTA POWER!! 11.25@129mph Fastest Street legal FWD Probe 2004