Slightly Rough Idle

[grimreaper]

::shrug::sounds similar to mine. I cant hear my valve tick out the back now but could before i readjusted the shims.
looks like the car is in a garage... noise will travel a LOT more then out in a parking lot or something.

Maybe its my exhaust (hyper medallion, moderatly quite, can hear more motor), but i would never consider the 7m a "quite" motor. Park next to an evo or something newer and compare...

 

[Alec]

sounds similar to mine :shrug: I cant hear my valve tick out the back now but could before i readjusted the shims.
looks like the car is in a garage... noise will travel a LOT more then out in a parking lot or something.

Yes, it's in a garage with another car next to it. If you can tell, my camera pick up A LOT of sound, it's really sensitive. It's not that loud in person, so I'm more concerned about the idle. I'm guessing it either needs to be timed or needs a new coil(s). But I'm not sure.

 

[Zumtizzle]

New Coils is more than likely no.


But take a timing light and check it out.

 

[Alec]

New Coils is more than likely no.


But take a timing light and check it out.

Umm, I'm confused at what you're trying to say. More than likely no?

 

[Zumtizzle]

Sorry,

I'll be more clear.

Coils are ussually well within specs.


As for timing light; How the hell else do you check ignition timing?

 

[Alec]

How the hell else do you check ignition timing?

No, you said, "New Coils is more than likely no." I'm confused at what you're saying.

 

[Zumtizzle]

They rarely need to be replaced on the M Supras.

I've only had to replace them on one, and it was on the passenger side and because of heat.

 

[jdub]

Zum means it is very likely that the coils are not the problem.
Get a timing light, jump the diagnostic block per the TSRM, and set your timing to 10 deg BTDC. Then remove the jump wire and check timing advances to ~14 deg.

 

[Alec]

Zum means it is very likely that the coils are not the problem.
Get a timing light, jump the diagnostic block per the TSRM, and set your timing to 10 deg BTDC. Then remove the jump wire and check timing advances to ~14 deg.

Umm, not to sound like a newb, but how exactly do I set the timing? I've never timed a car before. I presume it's in the TSRM, lol. Could it also be that my intake manifold is dirty? It seemed that it was kinda dirty, but normal for a 20 year old car.

 

[supra_guy]

Umm, not to sound like a newb, but how exactly do I set the timing? I've never timed a car before. I presume it's in the TSRM, lol. Could it also be that my intake manifold is dirty? It seemed that it was kinda dirty, but normal for a 20 year old car.

Timing as in like timing belt? I don't think its a great idea doing it yourself if your new to it. Correct me if I'm wrong anyone ealse, but isn't setting the timing quite hard?

 

[Zumtizzle]

Umm, not to sound like a newb, but how exactly do I set the timing? I've never timed a car before. I presume it's in the TSRM, lol. Could it also be that my intake manifold is dirty? It seemed that it was kinda dirty, but normal for a 20 year old car.

It's not hard.

But if you don't have one i'd take it to a Shop or someone local who has one, and slide him a few bucks.

 

[Alec]

It's not hard.

But if you don't have one i'd take it to a Shop or someone local who has one, and slide him a few bucks.

how much do they usually charge to set the timing?

 

[hvyman]

you jump it like checking codes, timing light has cables for pos and neg for battery and then a clamp that goes on the no1 spark plug wire. check to make sure its at the number 10 by the crank if not turn the cps till it is.

 

[Zumtizzle]

Timing as in like timing belt? I don't think its a great idea doing it yourself if your new to it. Correct me if I'm wrong anyone ealse, but isn't setting the timing quite hard?

Setting the "Cam to Crank" Timing isn't hard.

Set the crank to 0 then match marks on the cams.

 

[supra_guy]

Zum you are like a walking book of step by step info with illustrations. Very nice.

 

[Zumtizzle]

Zum you are like a walking book of step by step info with illustrations. Very nice.

I just don't want to type out everything.

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/

This if for the 90. But if you search theres a 87 one floating around.

 

[Alec]

My friend tells me to start the car with E1 and TE1 connectors and if it idles better, it's the timing. Is that true?

 

[supradjza80]

I keep listening to the video and think the car sounds normal idling...maybe I'm deaf, I would check the timing and leave it at that. I hope you are not chasing a ghost.

 

[Alec]

But is my friend right? He says to start the car in diagnostic mode and if it idles better, then I know it's the timing. Could that hurt anything?

 

[CajunKenny]

My friend tells me to start the car with E1 and TE1 connectors and if it idles better, it's the timing. Is that true?

The TSRM makes no mention of this.