No spark on cylinder #1

[Tobes]

So I have no spark on #1 cylinder. I pulled the injectors and tested everything. Each coil pack works but none work on cylinder #1. Spark plug also works on all except #1. At this point, it has to be an electrical issue somewhere behind the coil.

Before I go ripping the harness apart, any thoughts? The wires do not seem loose at the connector either. 200 hours 2015 AR190 (1.8L NA).

 

[Joshua Miller]

Are the wire harnesses long enough to swap?

 

[Tobes]

Are the wire harnesses long enough to swap?

Doesn't change anything. The plug @ cylinder #1 isn't firing the coil. I moved the coils around. C1 coil works on all others. All other coils don't work on C1 and same with the plugs so that means the issue is from the connector on back.

 

[VitaminSea]

@FLJetBoater had an issue he documented here, but sure if he was ever able to locate the pin for the wiring harness.

https://jetboaters.net/threads/help-one-engine-won%E2%80%99t-pass-6500-rpm.34229/#post-551221

 

[VitaminSea]

@jetboatsupply posted a similar inquiry, unsure of resolution.

https://jetboaters.net/threads/coil-pack-connecter-replacement.32054/

 

[David Martin]

Your are going to need a multi meter to test voltage at the wire harness to the coil.............and a peak voltage adapter for the multi meter makes things easer. First without the peak voltage adapter just use meter to see if you have 12v coming from the Batt to coil on all wires. The Peak adapter can be found on Amazon around 36 dollars or eBay it comes with meter for 39 dollars. Your testing wires from coil to pick up coil to EMC computer..........before doing all the testing with meter just pull all the connectors and clean them with electronic spray and a a dab of dielectric electric grease going back together never hurt.

Photos are out of my service manual HOPE this helps a little...I hate corrosions and electrical problems.

 

[Tobes]

Thanks for those pics. Will give it a go if I have time tomorrow.

 

[Tobes]

Well, it turned out to be the 3 pin female connector on the wiring harness. I stripped back the wires just past the connector and rigged up some shit to the coil. Had spark again. Put the connector back on, no spark.

Now to try and source the connector but in the meantime, I should be able to keep it rigged up to go out.

 

[Tobes]

I found the connector but holy shit. OReilly in town wants $105 for it! This place wants $75! Insanity.

https://www.stockwiseauto.com/standard-motor-products-s2438-vehicle-speed-sensor-connector

Actually, I just found this. Looks like it is the same. I will order one and see how it goes and report back as this seems to be a little more common of an issue.

Toyota 3-Pin Vehicle Speed Sensor (VSS) Connector Plug Kit

Genuine OEM connector kit for Toyota 3-pin factory vehicle speed sensor (VSS) used across various vehicles, compatible with stock terminals and wire. If you choose to replace a deteriorated OEM housing, simply de-pin and replace with this one, crimping on new terminals only if desired. Kit...

www.ksvlooms.com

 

[Zizzou 192]

Did you cross reference the connector visually or were there other markings on it that clued you in as well?

It has come to my attention in the past that there are very few Yamaha specific parts on these boats.

 

[Tobes]

Yeah. It looks like it might work hopefully. I have one coming from Amazon and should be here Thursday. No markings on the connector at all.

 

[Tobes]

Just to update for those who might have the same issue. The above part works. I picked it up from Amazon for faster shipping @ $10 shipped. Spliced it in and no issues!

Amazon.com: Michigan Motorsports Vehicle Speed Sensor VSS connector pigtail FITS 1JZ-GTE, 2JZ-GTE, R152, V160, W58 Fits Toyota Lexus : Automotive

Buy Michigan Motorsports Vehicle Speed Sensor VSS connector pigtail FITS 1JZ-GTE, 2JZ-GTE, R152, V160, W58 Fits Toyota Lexus: Wiring Harnesses - Amazon.com ✓ FREE DELIVERY possible on eligible purchases

smile.amazon.com

Got it installed today and took the boat out. Runs like a champ again. I think the connection may have been fading. I haven't hit 7700rpm in a bit and it was holding there today. Hit 41mph with 2 adults (about 350 lbs) and all my gear/stereo equipment/batteries.

 

[David Martin]

Thanks ........great job its nice to know a good reference on the injector plug I wish we has a sticky thread so we could list parts like this that would help in the future when someone is looking.........I just found the fuel rail couplers they are the same as the fuel tank couplers....I was needing these couplers because Yamaha did not put a Schrader valve on the fuel line or injector rail to read the fuel pump pressure. They are 7.89-7.85mm quick connectors. A quick 11 bucks and I have both male&female to make a Schrader valve test rig.