I have a wierd problem. Just picked up an S-10 with a syclone motor in it. It runs really rough. The wierd thing is, when i take off the wires, put em back on, then start it up, it runs smooth as butter for about a minute then begins to slowly act up again. Runs good when you drive it too and real strong. What could it be? Timing off? Vacuum leak? bad wires/ Distributor? Thanks for any help.
Runing rough
- Thread starter onlyasix
- Start date
cloneman315
Active member
Re: Runing rough
do a full ignition tune up and put magnacore or tailor wires on it no junks
do a full ignition tune up and put magnacore or tailor wires on it no junks
live1053rulz
Nor Cal SyTy
Re: Runing rough
MSD makes a good set of SyTy tires now as well.
cloneman315 said:
MSD makes a good set of SyTy tires now as well.
wantingasy
Active member
Re: Runing rough
MSD makes tires now!!!!! Cool!!!!!! :rotf: Jk, I agree the MSD "wires" are a good choice!live1053rulz said:
live1053rulz
Nor Cal SyTy
Re: Runing rough
Whoops, wires. Ahaha. Yep, I like 'em. 8.5mm I think, and red to match my truck. (I think you can get them in all sorts of colors though.)
Whoops, wires. Ahaha. Yep, I like 'em. 8.5mm I think, and red to match my truck. (I think you can get them in all sorts of colors though.)
Re: Runing rough
The brown wire that comes out of the main harness for about 12" ans has a connecter says something like PEN 15. I dissconnected it and with my timing light set on 0 degrees, at idle could not see any mark. At about 2000RPM it was reading 8 so i adjusted it to 0. Plugged the wire back in and it reads about 12 at idle and somewhere past that when up in RPM i would estimate about 20-25. Is this correct? It still runs rough and every few seconds drops in RPM and then picks up again. Is there supposed to me a MAF sensor on these motors? Im stumped. Maybe plugs & wires will help but i dont think thats it. what do you guys think?
The brown wire that comes out of the main harness for about 12" ans has a connecter says something like PEN 15. I dissconnected it and with my timing light set on 0 degrees, at idle could not see any mark. At about 2000RPM it was reading 8 so i adjusted it to 0. Plugged the wire back in and it reads about 12 at idle and somewhere past that when up in RPM i would estimate about 20-25. Is this correct? It still runs rough and every few seconds drops in RPM and then picks up again. Is there supposed to me a MAF sensor on these motors? Im stumped. Maybe plugs & wires will help but i dont think thats it. what do you guys think?
outlaw1987
Member
Re: Runing rough
Yeah doing an ignition tune-up and oil change would be the first thing I do to that truck, my truck ran rough and missed when I got it but now runs like a champ due to me doing a simple tune-up, That and the person who owned the truck before you might have put the wrong wires in as in my case I had cr43ts' ac delcos instead of cr42ts spark plugs, Also the wires I use are the Accel extreme heat 9000s and are an excelent choice with lifetime warrenty.
Yeah doing an ignition tune-up and oil change would be the first thing I do to that truck, my truck ran rough and missed when I got it but now runs like a champ due to me doing a simple tune-up, That and the person who owned the truck before you might have put the wrong wires in as in my case I had cr43ts' ac delcos instead of cr42ts spark plugs, Also the wires I use are the Accel extreme heat 9000s and are an excelent choice with lifetime warrenty.
Re: Runing rough
Ok i'll do that this weekend. So they take the 42's gapped at what 032? I think both the plugs are the same just one is a colder plug. The car has taylor wires on it now. Should i change any of the distributor part also? Thanks alot. Hopefully get this thing running good this weekend.
outlaw1987 said:
Ok i'll do that this weekend. So they take the 42's gapped at what 032? I think both the plugs are the same just one is a colder plug. The car has taylor wires on it now. Should i change any of the distributor part also? Thanks alot. Hopefully get this thing running good this weekend.
vinnieTy
TY # 1889
Re: Runing rough
Do a complete tune up
Wires
plugs
cap
rotor
and if you want to be nice change the oil. After that listen for any vaccum leak. Anything lose. Just keep pocking around. I have found a few of them just by doing that. Moved a vaccum hose one way just to check underneath and bang the idle would go crazy.
Do you have any Dash lights on? abs, check engine crap like that.
Do a complete tune up
Wires
plugs
cap
rotor
and if you want to be nice change the oil. After that listen for any vaccum leak. Anything lose. Just keep pocking around. I have found a few of them just by doing that. Moved a vaccum hose one way just to check underneath and bang the idle would go crazy.
Do you have any Dash lights on? abs, check engine crap like that.
dhorsman2000
Member
Re: Runing rough
:rotf: :rotf: :rotf: I've got the same problem with my truck :rotf: :rotf: When I first bought it I did all the stuff that you have done (ie: plugs, wires, cap, rotor, new silicone vacuum lines, etc.) truck still idling like crap, fluctuating all over the place. One day by accident I sprayed brake clean at the throttle plate shaft and the rpms went bonkers. Turns out I have a vacuum leak at the shaft which makes the IAC motor search for the perfect RPM but it cant find it because of the vacuum leak. Also my throttle sticks ever so slightly at almost closed throttle. Meaning if I let off the gas, the throttle plates won't close all the way unless I snap the throttle, then the plates close all the way until I take off and do it again. So I am in need of a new throttle body :rant: If I were you I would check your throttle plate shaft to see if there is any movement from side to side, or up and down, if there is you can almost garuantee it has a vacuum leak there and you probably have the same problem I do, new TB time :tup:
Dewey
:rotf: :rotf: :rotf: I've got the same problem with my truck :rotf: :rotf: When I first bought it I did all the stuff that you have done (ie: plugs, wires, cap, rotor, new silicone vacuum lines, etc.) truck still idling like crap, fluctuating all over the place. One day by accident I sprayed brake clean at the throttle plate shaft and the rpms went bonkers. Turns out I have a vacuum leak at the shaft which makes the IAC motor search for the perfect RPM but it cant find it because of the vacuum leak. Also my throttle sticks ever so slightly at almost closed throttle. Meaning if I let off the gas, the throttle plates won't close all the way unless I snap the throttle, then the plates close all the way until I take off and do it again. So I am in need of a new throttle body :rant: If I were you I would check your throttle plate shaft to see if there is any movement from side to side, or up and down, if there is you can almost garuantee it has a vacuum leak there and you probably have the same problem I do, new TB time :tup:
Dewey