Jump to content
  • Welcome to SAU Community

    Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of SAU Community by signing in or creating an account.

    • Start new topics and reply to others
    • Subscribe to topics and forums to get email updates
    • Get your own profile page, build reputation and make new friends
    • Send personal messages to other members.
    • See fewer ads!

    Consider joining our newsletter for the latest content updates

    Click here to register


#1Illest

Spark and pulse on cyl1 and cyl3 only

Recommended Posts

So I have a s1 r33 . I have only spark and pulse on cylinders1 and 3 while the car is running I pull the plug on each cylinder and injector while running only 1 and 3 do anything.. tho I have pulled the coils out tested it seams to have spark on all coils also pulled the rail off an all six pulse fuel out. bench tested the injectors for pulse an resistance all seem fine the numbers were all the same 11 or 12 ohms i believe.. what could this be ecu? 

Link to post
Share on other sites

Well when I pull off either of the injector plug or coil plug something only happens on 1 an 3 all others on both injector and coil has no change in idle

Link to post
Share on other sites

It seems to idle not bad has few backfires hear an there.. checked compression its a little low tho its135 to 140 across all cylinders 

Link to post
Share on other sites

It's a s1 body with s1 loom but s2 coils so I deleted the ignitor box wired in the s2 coil harness to the s1 loom earthed it got 12 volts across all coils. No fault codes showing up 

Link to post
Share on other sites

Any help would be good.. first time using forum so apologies.. 1st off my car starts..., idles ok but it's definitely not on all cylinders how many I don't no.. like I said engine doesn't change idle speed when I pull the power supply plug on injector 6,5,4,2 or coil 6,5,4,2 

Link to post
Share on other sites

OK, so now we're a bit more clear. When you said "only have pulse on 1 & 3", that's not true, and it was conflicted by what you said in your first post "pulled the coils out tested it seams to have spark on all coils also pulled the rail off an all six pulse fuel out".

What you really meant was "all cylinders except 1 & 3 appear to really suck".

Could be that those other 4 injectors are too dirty to give you a decent dose, the spark plugs are shitty, the compressions are actually really shit and perhaps masked by oil in the cylinders, etc etc etc.

We are not going to be able to remote diagnose this. I suggest you either take it all apart yourself and see what's inside, or take it to a mechanic for a little bit of directed and effective diagnosis.

Link to post
Share on other sites

When you pulled the spark plugs out to do the compression test, what did the plugs on cylinders one and three look like compared to rest? Did you put the same plugs back into the same cylinders after the compression test?  Have you tried new spark plugs?

You said you had power to the coils, use a LED test light to check to see if the computer is switching the earth at the coils. And/or use a noid light to check for injector pulse and report back your findings.

Link to post
Share on other sites

Has new plugs 1 an 3 when pulled out were a little white an the rest verry fuely not dripping wet but smelly of fuel an I did put them back in same cylinders 

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



×
×
  • Create New...