help newb question

mk3toy · 07-07-2006, 04:22 AM

iv just baught an 87 supra non turbo auto, my problem is when i start it in the morning its fine when it warms up and i turn it off and come back to it 20 minutes later the #1 cylynder misses not the plugs, not the leads, ? im thinkin injecter any help would be great thanks

Isphius · 07-07-2006, 10:27 PM

Put some fuel injector cleaner in. And change your dist cap and rotor. I had this too, i put some paint thinner in the gas tank (probably not good) but it cleaned the injectors right up.

mrnickleye · 07-08-2006, 04:06 AM

ONLY use injector cleaner, because other things like paint thinner will be too harsh on the non-metal parts.

Try some TECHRON. 2 bottles in a full tank.

If its fine when cold, can you drive it, and it runs OK, then it gets worse after warmed up??

That would not be injectors plugged. That sounds more primary electrical system. Not secondary (plugs and wires, cap, rotor)

How do you know its #1. Does it get a steady spark?

You may need to Do a compression test to see where the engine is mechanically.

I have seen many cars with one or more injectors plugged. Especially if the car has sat for a long period, months. But a plugged injector is a problem that is present all the time, not just when warm.

mk3toy · 07-08-2006, 06:09 AM

when i start the car for the first time in the morn it runs perfect and will continue to run perfect as long as i dont turn it off. when i turn it off and re start after say 1/2 hr it misses on #1 and it has lots of spark and i changed the plugs, i even ran it with the #1 spark plug out and no fuel, seems to be lots of compression plug is sparkin away but still misses, then i let it sit for say4 or 5 hours and whala perfect again, the car has had a motor swap from what the previous owner told me, the original motor blew a head gasket and it was cheaper to replace the motor with another used one.

SupraSaver87 · 07-08-2006, 01:49 PM

Wow...it sounds almost like my car. Although mine sounds like its just missfireing on ONE of the cylinders....however I didn't know you could run the engine without the spark pluggs in. How do you stop fuel to the cylinder? Or do you not need to to have the engine running when the spark plug is out?

mk3toy · 07-08-2006, 03:00 PM

Quote:

Originally Posted by SupraSaver87

Wow...it sounds almost like my car. Although mine sounds like its just missfireing on ONE of the cylinders....however I didn't know you could run the engine without the spark pluggs in. How do you stop fuel to the cylinder? Or do you not need to to have the engine running when the spark plug is out?

i took the #1 spark plug out and ran it and there was no fuel coming out . sound funny like a helicopter

sharkn · 07-18-2006, 05:20 AM

there is a bleeder on the fuel rail..try that by some miricle of the supra gods the junk might get bleeded out.
the rail/injectors/lines are the only things that would be effected by the temp change in the engine compartment maybe the high heat is loosening the junk up so run the motor to get it hot...get a cup and bleed the lines for a few seconds look @ the fuel if it has crap in it thats a good sign of a clogged injector

im not so sure but the number 1 is the 1st one fed right? that might explain why its the only one clogged

Isphius · 07-18-2006, 08:34 PM

They are all fed pretty evenly, The whole line is pressurized and the injectors it let it in as neccesary. With fuel, It can get hot and start to vaporize in the lines if the rail gets hot.big problem on a lot of straigh 6 motors. I dont think its your problem, But who knows. It does cause something similar to that, seems like a miss. It does sound like something electrical tho, If it starts to run bad and then gets hot and worse. Electronics like being cold. You might have a dry soldier joint somewhere, on the millions of solder joints. Thats where the lead isnt attached to the metal(really soldered and not fake), it just touched it enough to make contact and then heats up and expands outwards. Look for honda main relay resolder to see what i mean. Its a common problem on the main relay in the civic/integra

07-07-2006, 10:27 PM	#2
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	Put some fuel injector cleaner in. And change your dist cap and rotor. I had this too, i put some paint thinner in the gas tank (probably not good) but it cleaned the injectors right up. __________________ Yay the supra assistant is gone!!! WEEE!!

07-08-2006, 04:06 AM	#3
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	ONLY use injector cleaner, because other things like paint thinner will be too harsh on the non-metal parts. Try some TECHRON. 2 bottles in a full tank. If its fine when cold, can you drive it, and it runs OK, then it gets worse after warmed up?? That would not be injectors plugged. That sounds more primary electrical system. Not secondary (plugs and wires, cap, rotor) How do you know its #1. Does it get a steady spark? You may need to Do a compression test to see where the engine is mechanically. I have seen many cars with one or more injectors plugged. Especially if the car has sat for a long period, months. But a plugged injector is a problem that is present all the time, not just when warm. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08. Last edited by mrnickleye; 07-08-2006 at 04:10 AM.

07-08-2006, 01:49 PM	#5
SupraSaver87 3" Exhaust Join Date: Jun 2006 Location: Manitoba Posts: 150	Cool Wow...it sounds almost like my car. Although mine sounds like its just missfireing on ONE of the cylinders....however I didn't know you could run the engine without the spark pluggs in. How do you stop fuel to the cylinder? Or do you not need to to have the engine running when the spark plug is out? __________________ My Ride: http://www.cardomain.com/ride/2351563 Our Supra’s, which art in the driveway, Hollowed be thy power, thy mods are great, thy speed endless, On the road or at the track. Give us this day free of cops, And forgive us our impound charges, as we forgive those who are slow. And lead us not into speed traps, and deliver us from the interceptors, For thine is our car, the power, and the glory…forever and ever….amen.

07-18-2006, 08:34 PM	#8
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	They are all fed pretty evenly, The whole line is pressurized and the injectors it let it in as neccesary. With fuel, It can get hot and start to vaporize in the lines if the rail gets hot.big problem on a lot of straigh 6 motors. I dont think its your problem, But who knows. It does cause something similar to that, seems like a miss. It does sound like something electrical tho, If it starts to run bad and then gets hot and worse. Electronics like being cold. You might have a dry soldier joint somewhere, on the millions of solder joints. Thats where the lead isnt attached to the metal(really soldered and not fake), it just touched it enough to make contact and then heats up and expands outwards. Look for honda main relay resolder to see what i mean. Its a common problem on the main relay in the civic/integra __________________ Yay the supra assistant is gone!!! WEEE!!

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07-07-2006, 04:22 AM	#1
mk3toy Stock Join Date: Jul 2006 Location: bc Posts: 3	help newb question iv just baught an 87 supra non turbo auto, my problem is when i start it in the morning its fine when it warms up and i turn it off and come back to it 20 minutes later the #1 cylynder misses not the plugs, not the leads, ? im thinkin injecter any help would be great thanks

07-08-2006, 06:09 AM	#4
mk3toy Stock Join Date: Jul 2006 Location: bc Posts: 3	when i start the car for the first time in the morn it runs perfect and will continue to run perfect as long as i dont turn it off. when i turn it off and re start after say 1/2 hr it misses on #1 and it has lots of spark and i changed the plugs, i even ran it with the #1 spark plug out and no fuel, seems to be lots of compression plug is sparkin away but still misses, then i let it sit for say4 or 5 hours and whala perfect again, the car has had a motor swap from what the previous owner told me, the original motor blew a head gasket and it was cheaper to replace the motor with another used one.

07-18-2006, 05:20 AM	#7
sharkn 3" Exhaust Join Date: Jun 2006 Location: georgia Posts: 50	there is a bleeder on the fuel rail..try that by some miricle of the supra gods the junk might get bleeded out. the rail/injectors/lines are the only things that would be effected by the temp change in the engine compartment maybe the high heat is loosening the junk up so run the motor to get it hot...get a cup and bleed the lines for a few seconds look @ the fuel if it has crap in it thats a good sign of a clogged injector im not so sure but the number 1 is the 1st one fed right? that might explain why its the only one clogged