rough idle rocking the car?

[taka21]

hey i got a lil issue
for the last week or so my motor has been idling lower and lower
i cant figure out why but at the moment it starts up and idles like its got some seriously aggressive cams in it it actually rocks the car back and forth.
now up until a week or so ago it was running fine idling smooth. now even when its been running for a while it has that rough idle like when i stop at a light
im just fishing for ideas as to what it could be

i recently changed all the vac lines and the spark plugs

thanks

 

[koreyd]

have u checked your injectors
i had the idle shaking car problem and thats what it is was for me

 

[taka21]

have u checked your injectors
i had the idle shaking car problem and thats what it is was for me

i just seafoamed the engine but how would i check the injectors
are we talking about flow testing or resistance?

 

[Poodles]

seafoam is terrible, don't use it.

If you put it in your oil, CHANGE IT NOW.

 

[supraman508]

i just seafoamed the engine but how would i check the injectors
are we talking about flow testing or resistance?

let me give you my opinion on seafoam,that sh#$ REALLY WORKS.iv'e seen the proof.on my first head gasket job their was alot of carbon welded on the tips of my valves.after using SEAFOAM, on my 2nd head job do to not torquing the headbolts properly the seafoam cleaned the heck out of my valves.Not everybody has a chance to put seafoam in their car and want to take the engine apart to see if it worked.I had no choice and the results were amazing.

 

[Poodles]

can do the same with water or good gas...

 

[supraman508]

can do the same with water or good gas...

yeah with high presure water and gas that has acid in it:biglaugh:

 

[Poodles]

lol, running better gas, or putting small amounts of water through a vacuum line like you do with the seafoam...

 

[dumbo]

Codes....thats a productive start. Then go from there.

 

[koreyd]

when i cheched mine i pulled them one at a time found that one and four weren't firing fixed the wiring and presto nice idle
and i have used seafoam in my bmw it worked ok to celan out my iac but its a temp fix u gotta fins out why there is a lot of carbon building up
running rich did it for me
440cc injectors in an na

 

[taka21]

seafoam is terrible, don't use it.

If you put it in your oil, CHANGE IT NOW.

i put some in the gas tank some in the oil and the rest through a major vac line
i then ran the car till it stoped smoking
(found a leak in my exhaust)
then changed my oil and checked my spark plugs

and now the novice question
how do i pull codes i never did it b4 on the supra

 

[dumbo]

http://cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=23

 

[taka21]

http://cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=23

ok i looked at that and there seems to be a tool that i need so it will blink out the codes
what is that tool and where can i get it

 

[AJ'S 88NA]

ok i looked at that and there seems to be a tool that i need so it will blink out the codes
what is that tool and where can i get it

Only tool you need is a paper clip Did you read the TSRM?

 

[dumbo]

Yup, paper clip, peice of wire, twisted up peice of tinfoil, you name it haha.

 

[taka21]

Only tool you need is a paper clip Did you read the TSRM?

yea i did i just forgot to come back on right after and change that post


i pulled the codes and it just came up with a code 12
system: rpm signal
diagnosis:no "NE" of "G" signal to the ecu within 2 seconds after engine has been cranked

 

[taka21]

yea i did i just forgot to come back on right after and change that post


i pulled the codes and it just came up with a code 12
system: rpm signal
diagnosis:no "NE" of "G" signal to the ecu within 2 seconds after engine has been cranked

so in my diging in the engine bay i ended up bumping my hand against the the distributor cap while the engine was on and my hand hit the number 3 connection and to my supprise it shocked me
now i may just be ignorant but i had to find out if i was just going crazy, so i touched all the other ones and none of them shocked me so figuring that it was a fluke i touched the #3 connection again and lo and behold it shocked me again
at this point i had to laugh at myself.

so im looking into a new sparkplug wire set and a new distributor cap and rotor button
is there anything else that i should be looking at in relation to solving the issue that caused the code 12?

 

[dumbo]

May help point you in the right direction, if you haven't see this yet, Good luck.
http://cygnusx1.net/supra/Library/TSRM/MK3/manual.aspx?Section=IG&P=3