Missing at idle

boosted5mge · 09-08-2006, 08:00 PM

I definetley have a a blown head gasket. I guess I am just going to buy an SCE titan. Also, before the head gasket blew I was having a real bad miss from idle to about 2500 rpm then it smoothed out. I have change the plugs, wires, cap, rotor, played with fuel pressure, tried to adjust timing a little. I was wondering if anyone else has ever had a mysterious miss and what it was when they figured it out. Thanks

SupraSaver87 · 09-08-2006, 08:23 PM

If you would mosey on over to the MKIII section...you'll see that we have a couple people with this problem as well. Now you seem to have done everything that most people do to fix the problem...however there is one other thing that seems to be missing in your troubleshooting.

I woud check your air intake...all of it! Make sure you are getting proper air. Also you can go to a shop, and get them to check it out, get a second, third...maybe even a fourth opinion. With something like that, it could cost you $0.50 in tubing, or it could cost you the price of new cams?? (Timing would give a sputter, but shouldn't really smooth out over 2,500...but meh!)

I personally own an MKIII Turbo...well two of them, one auto, one 5spd....you can PM me with any questions you might have...I have a good general sense on things, but regretably a small amount of hands on time.

supra1985turbo · 09-22-2006, 07:15 PM

you could have a lobe flatning on your cams, you can have a weak valve spring or two, but from my experiance and I could be wrong but, it sounds like you have a burnt valve. if your replacing the head gasket I would get that checked out

ogh · 11-13-2006, 06:46 AM

my supra was doing the same thing untill i changed the fuel pump and now it is good as new

brian leiser · 11-15-2006, 03:04 AM

Quote:

Originally Posted by boosted5mge

I definetley have a a blown head gasket. I guess I am just going to buy an SCE titan. Also, before the head gasket blew I was having a real bad miss from idle to about 2500 rpm then it smoothed out. I have change the plugs, wires, cap, rotor, played with fuel pressure, tried to adjust timing a little. I was wondering if anyone else has ever had a mysterious miss and what it was when they figured it out. Thanks

run a compression test it will give you alot of info about your engine

hangsupra · 11-19-2006, 08:23 PM

if i'm you.... i will check on the fuel injecter... where the wired connect to the injecter... cause some old skool car like that might use the pin in the connect on the injecter... so you need to unplug the wired from the injecter and double check the connection...

cause thats what i use to had on my piston one.... especially when you first step on the gas and it goes from certain mph or certain limit and the car start accel. good.... so my friend told me to check n i did check n thats the prolem i found out...

but what about right now.. did you get your blow head gasket fix it yeah... let us know before i telling you more detail alright.

09-08-2006, 08:00 PM	#1
boosted5mge Stock Join Date: Sep 2006 Location: Clifford, IN Posts: 10	Missing at idle I definetley have a a blown head gasket. I guess I am just going to buy an SCE titan. Also, before the head gasket blew I was having a real bad miss from idle to about 2500 rpm then it smoothed out. I have change the plugs, wires, cap, rotor, played with fuel pressure, tried to adjust timing a little. I was wondering if anyone else has ever had a mysterious miss and what it was when they figured it out. Thanks

09-08-2006, 08:23 PM	#2
SupraSaver87 3" Exhaust Join Date: Jun 2006 Location: Manitoba Posts: 150	I don't know much! If you would mosey on over to the MKIII section...you'll see that we have a couple people with this problem as well. Now you seem to have done everything that most people do to fix the problem...however there is one other thing that seems to be missing in your troubleshooting. I woud check your air intake...all of it! Make sure you are getting proper air. Also you can go to a shop, and get them to check it out, get a second, third...maybe even a fourth opinion. With something like that, it could cost you $0.50 in tubing, or it could cost you the price of new cams?? (Timing would give a sputter, but shouldn't really smooth out over 2,500...but meh!) I personally own an MKIII Turbo...well two of them, one auto, one 5spd....you can PM me with any questions you might have...I have a good general sense on things, but regretably a small amount of hands on time. __________________ 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.

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09-22-2006, 07:15 PM	#3
supra1985turbo 3" Exhaust Join Date: Sep 2006 Location: Kingwood, TX Posts: 63	you could have a lobe flatning on your cams, you can have a weak valve spring or two, but from my experiance and I could be wrong but, it sounds like you have a burnt valve. if your replacing the head gasket I would get that checked out

11-13-2006, 06:46 AM	#4
ogh Stock Join Date: Aug 2006 Location: Oak Harbor Posts: 6	my supra was doing the same thing untill i changed the fuel pump and now it is good as new

11-19-2006, 08:23 PM	#6
hangsupra 12psi boost Join Date: Jan 2005 Location: 209 area in cali. Posts: 397	if i'm you.... i will check on the fuel injecter... where the wired connect to the injecter... cause some old skool car like that might use the pin in the connect on the injecter... so you need to unplug the wired from the injecter and double check the connection... cause thats what i use to had on my piston one.... especially when you first step on the gas and it goes from certain mph or certain limit and the car start accel. good.... so my friend told me to check n i did check n thats the prolem i found out... but what about right now.. did you get your blow head gasket fix it yeah... let us know before i telling you more detail alright.