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Old 07-15-2018, 08:27 AM   #26
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Injectors can cause misfires.

Coolant temp sensor in spec?
Add a can of Techron and run the piss out of it. Wfo when ever possible. If a injector has just a small poor pattern it can cause a miss on a cold start.
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Old 07-15-2018, 09:40 AM   #27
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I have swapped it already with one from the jy, and it doesnt have a fuel smell out the vacuum line, but I know that doesnt mean anything. Ill try reading the pressure soon see what its looking like.

First one I broke gave 5 bar pressure. Nothing came out from vacuum or return line. Second that I broke barely hold 2 bar pressure on idle, and giving throttle did nothing to fuel pressure.

Anyway, in both cases car was extremely hard to start (black smoke) and light hesitation on few first miles. HC was high on annual emission control, (60-70 Ppm) when I usually get under 20. Lh 2.4 is darn good fixing small faults by itself, I guess.

I got pressure gauge with T-fitting (Ermeto L8 size) but you can easily measure pressure with tire pressure gauge from Schader valve
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Old 07-15-2018, 03:03 PM   #28
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This is a video of the cold start this morning...

https://m.youtube.com/watch?v=U_PwGFOzuwE
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Old 07-15-2018, 03:33 PM   #29
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My wagon does seem to clear out a bit easier than that. It has the efi like you. Usually it is the winter weather when mine starts like that. Now that summer is here the cars don't run chunky like that when cold.
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Old 07-16-2018, 08:15 PM   #30
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I also have a different, maybe not so different problem while cruising. I have another thread about it, but maybe there connected? It only happens at 10 in hg of vacuum and an interminnent rich spike/misfire. Its very annoying, and for as long as I've owned the car these problems have been there. Even thru an engine swap...

Symptoms of hopefully the same issue...
Cold start bogging/missing

Even when warm 75% of the time any throttle input puts the afrs into the 11s and its not quick off the line...it recovers to 14s fast but I believe it shouldnt do this.

While cruising at 10inhg and light throttle, just keeping speed, random stumble and afrs drop to ~11 and recovers.
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Old 07-16-2018, 09:38 PM   #31
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Intermittent problems are tough unless you catch them in the act. Probably just start with going over things like connections to sensors, grounds. Look for any sneaky vacuum leaks. Maybe try some component substitution like a different air mass sensor?
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Old 07-17-2018, 10:11 AM   #32
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OP double check that all grounds are perfect. Remove the bolt that squeezes the wires to make the ground. Polish up the connector. Reassemble. Replace fuel system relays. Replace the fuse and take a long look at the fuse holder.
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Old 07-17-2018, 10:29 AM   #33
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Originally Posted by Mbeas96 View Post
I also have a different, maybe not so different problem while cruising. I have another thread about it, but maybe there connected? It only happens at 10 in hg of vacuum and an interminnent rich spike/misfire. Its very annoying, and for as long as I've owned the car these problems have been there. Even thru an engine swap...

Symptoms of hopefully the same issue...
Cold start bogging/missing

Even when warm 75% of the time any throttle input puts the afrs into the 11s and its not quick off the line...it recovers to 14s fast but I believe it shouldnt do this.

While cruising at 10inhg and light throttle, just keeping speed, random stumble and afrs drop to ~11 and recovers.
I'd put meter on the TPS signal and see if it's jumping around.
It should make a smooth transition from low to high as the pedal is smashed.

I'm thinking the signal looks like a saw blade and the ecu gets confused thinking you are jacking off the throttle?
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Old 07-17-2018, 02:29 PM   #34
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Okay guys, ill definitely give a good look today. After work I will clean grounds again, inspect my hoses for tears/spray some more carb cleaner everywhere.

Ive replaced the fuel pump relay but also have a spare OEM one ill try. Would you suggest swapping the RSR?
My brother also has his 016 amm that he'll probably let me try out. I've got another knock sensor to try also.

I'm definitely a noob when it comes to using a meter, while measuring the TPS, is there only 2 wires that exit it that I would probe? Would the car need to be running? Or the ignition just in the ON position?

Also going to take a look at fuel pressure when I go to leave.
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Old 07-17-2018, 05:38 PM   #35
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Is this a Regina car?
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Old 07-17-2018, 05:46 PM   #36
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Is this a Regina car?
Lh2.4 but no tests today, its pouring...
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Old 07-17-2018, 06:02 PM   #37
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Ok so disregard post 33. And TPS won't cause misfires.
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Old 07-17-2018, 06:26 PM   #38
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Cool, I checked to see if it was adjusted properly and it clicks as soon as the throttle opens.
Will get back hopefully tomorrow with something helpful
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Old 07-18-2018, 07:20 PM   #39
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So it rained a lot...so I couldn't test my amm or check any hoses. But I did get a cold start fuel pressure reading in this video...

https://www.youtube.com/watch?v=DVK1FTxORt8&app=desktop

Plus I tested it at operating temp, when idling in park its at 40 psi stable, when revved high in park it drops to about 30 psi...doesn't sound like its causing my rich conditions I'm experiencing.
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Old 07-19-2018, 05:26 PM   #40
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I tested my AMM with a meter a few mins ago, I followed brickboard instructions. First checking ground, ohms between terminal 1 and ground is .8ohms, it says it should be 0.0 ohms. So bad ground?

Next it said to start engine, probe terminal 3 and ground and you should get approximately 2.3v. Mine is 3.1-3.0 volts.

Sooo, am I looking at a bad AMM because of the second test? Or just a bad ground causing the volts to be wrong?
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Old 07-20-2018, 06:33 PM   #41
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And tested the ECT sensor, also using brickboard to help me out. Its 76 degrees outside and the car has been sitting for about 3 hours.

Between pins 13 and 5 I have 1.1-1.2 volts.
And the ohms tested at 2100

I believe this to be okay? Please tell me if I'm wrong. Like I said, I am a newb when it comes to meters/electrical stuff.

Then I went over every vacuum hose in the engine bay, all looked good except a slight crease/tear in one of my idle air hoses. I wrapped it with electric tape to see if anything changes. Re tightened all clamps and made sure all were round and not oval.

I cleaned and polished the passenger fender ground plate, the fuel rail grounds, and the ground strap from valve cover to frame.
Made sure all intake manifold bolts were tight, they were.

Remeasure AMM and got .1 ohms, something got better...but still higher voltage at 2.8-2.9 volts.
Also changed the knock sensor, cleaned up and made sure the block was clean. Tightened to 14lbs like greenbook says.

And what do ya know. It still ran cold like garbage. About to choke out when throttle is pressed...I havent driven it yet to see if it still has the occasional miss at cruise, but my gut tells me it will. Will report back.

Last edited by Mbeas96; 07-20-2018 at 06:41 PM..
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Old 07-22-2018, 08:05 PM   #42
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It was still happening..found more grounds; main battery ground to body and driver side fender grounds. Still happening. Borrowed my brothers known good AMM and it is still doing everything it was before. Bad cold start, random miss during cruise, hesitation and rich bog on acceleration.

Where to next? o2 sensor?
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