Can someone confirm my suspicions on a NO START condition?
#1
Can someone confirm my suspicions on a NO START condition?
2000 Civic EX had a used engine installed a few years ago. Stock D16Y8.
Started running poorly, now won't start, sounds a little funny cranking and sounds like it wants to start, but it won't.
It was towed to me. It has a known good, new distributor in it from a month ago. I also tried one from a running car, no change.
New cap, rotor, plugs, and wires. New crank position sensor, he wanted that installed regardless. I have good, strong, consistant spark to all 4 plugs.
I'm getting fuel into all 4 cylinders.
I checked the mechanical timing and it is exactly where it needs to be.
My compression test says
#1. 115
#2. 60
#3. 100
#4. 165
Thoughts and opinions?
Started running poorly, now won't start, sounds a little funny cranking and sounds like it wants to start, but it won't.
It was towed to me. It has a known good, new distributor in it from a month ago. I also tried one from a running car, no change.
New cap, rotor, plugs, and wires. New crank position sensor, he wanted that installed regardless. I have good, strong, consistant spark to all 4 plugs.
I'm getting fuel into all 4 cylinders.
I checked the mechanical timing and it is exactly where it needs to be.
My compression test says
#1. 115
#2. 60
#3. 100
#4. 165
Thoughts and opinions?
#2
PHANTOM MENACE
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Re: Can someone confirm my suspicions on a NO START condition?
Are you a mechanic? If not why was it towed to you specifically?
Anyways, those numbers should already be a dead give away. I'd recommend a leak down test if you still want to pin point things. Personally it's already going to be torn down or replaced in my head.
Anyways, those numbers should already be a dead give away. I'd recommend a leak down test if you still want to pin point things. Personally it's already going to be torn down or replaced in my head.
#3
Re: Can someone confirm my suspicions on a NO START condition?
#4
Re: Can someone confirm my suspicions on a NO START condition?
My thoughts on the subject being that I'm going to have to pull the head to determine anything further. The way I look at it, all the cylinders should at least be 150, but I've got 3 that are seriously lower. Obviously the lowest value is too low for it to run, but would the middle two values be low enough to cause a no-start condition?
#5
Re: Can someone confirm my suspicions on a NO START condition?
Did you rule out cylinder flooding?
#6
#7
Re: Can someone confirm my suspicions on a NO START condition?
Those numbers are a sure sign of a no start or run condition. If I recall, anything over a 20% variance can cause the no start or run condition. 65 psi to 165 psi is a touch over 20% to say the least.
Anyways, a leak down test can help you isolate whether the problem is head related or piston related before tear down.
Did you check to see if the mechanical timing is still correct?
Anyways, a leak down test can help you isolate whether the problem is head related or piston related before tear down.
Did you check to see if the mechanical timing is still correct?
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#8
PHANTOM MENACE
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Re: Can someone confirm my suspicions on a NO START condition?
I was just asking because the variation/deviation on those compression results should already be telling you something (I'm guessing that's what you wanted to confirm?). Again, leak down test to pin point if you want a better idea of what's going on. "TomCat39" is on the money.
#9
Re: Can someone confirm my suspicions on a NO START condition?
Well everybody is pretty much confirming what I was asking. That lets me know that basically, I'm not crazy and I checked pretty much everything that I could/should have checked in the situation.
As mentioned in the original post, I did in fact check the mechanical timing.
As mentioned in the original post, I did in fact check the mechanical timing.
#10
Re: Can someone confirm my suspicions on a NO START condition?
Did you remove the ECU fuse to disable fuel during the compression tests? Did you hold the throttle wide open for the tests?
#11
#12
Re: Can someone confirm my suspicions on a NO START condition?
I unplugged the injectors which achieved the same objective.
I checked it with the throttle plate open and closed, there was not much variation. You got the open set of numbers.
#13
Re: Can someone confirm my suspicions on a NO START condition?
Sounds good.
#14
Fish Twig
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Re: Can someone confirm my suspicions on a NO START condition?
How long have you had this car? A leakdown test for sure because some people here open my eyes to other possibilities that it could be a bent valve or a valve not completely seated against the head.
#15
Re: Can someone confirm my suspicions on a NO START condition?
I'm still going to do a wet compression test later today and most likely a leakdown test because this guy is fairly certain that he wants me to pull the head and go through everything.
#16
Re: Can someone confirm my suspicions on a NO START condition?
I'm sure you know if the numbers don't change then the leak down can help you pinpoint whether it's an exhaust side or intake side problem assuming no cracks anywhere.
#17
Re: Can someone confirm my suspicions on a NO START condition?
I was going to post earlier but got sidetracked. Wet test was nearly identical. Pulled the head, gasket issues, replaced everything, now it runs again.
What I am pretty sure happened is this, the car was running, then went to barely running (blew between 1-2 or 2-3), then quit running all together (the seperation in the gasket worked around the other side of cylinder which put it down 3 cylinders).
But after completing the job, it started up and ran smoothly, so I am fairly pleased. I appreciate any input towards confirming my suspicions.
What I am pretty sure happened is this, the car was running, then went to barely running (blew between 1-2 or 2-3), then quit running all together (the seperation in the gasket worked around the other side of cylinder which put it down 3 cylinders).
But after completing the job, it started up and ran smoothly, so I am fairly pleased. I appreciate any input towards confirming my suspicions.
#18
Re: Can someone confirm my suspicions on a NO START condition?
Time will tell the best.
I'm guessing you didn't test the block or the head for flatness?
D16Y8 already came standard with an MLS gasket so is not as common to blow like the graphite gaskets of the non vtec motors from 88-95.
This info would get my suspicions up as to why the mls gasket blew.
I'm guessing you didn't test the block or the head for flatness?
D16Y8 already came standard with an MLS gasket so is not as common to blow like the graphite gaskets of the non vtec motors from 88-95.
This info would get my suspicions up as to why the mls gasket blew.
#19
Re: Can someone confirm my suspicions on a NO START condition?
Time will tell the best.
I'm guessing you didn't test the block or the head for flatness?
D16Y8 already came standard with an MLS gasket so is not as common to blow like the graphite gaskets of the non vtec motors from 88-95.
This info would get my suspicions up as to why the mls gasket blew.
I'm guessing you didn't test the block or the head for flatness?
D16Y8 already came standard with an MLS gasket so is not as common to blow like the graphite gaskets of the non vtec motors from 88-95.
This info would get my suspicions up as to why the mls gasket blew.
Used a machinists flat edge tool, head and block are fine.
It's hard to say the mileage of the engine, because it was a junkyard engine. I am fairly certain that the cylinder head had never been removed from the block though.
I've repaired a few 96-00 head gasket issues. Previous to this one they all blew thru to the water jacket, not between cylinders though.
#20
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