Jess Posted September 20, 2021 Share Posted September 20, 2021 Hey friends, looking for some advice. I'm from California but I'm up visiting friends in Canada. I haven't driven my truck a ton while I've been here but when I have driven it it's been fine, until last night. I drove from where I'm staying to a friend's, roughly 10m drive, it was fine. When I went to leave a few hours later, truck wouldn't start. I was able to get it to move by giving it a ton of gas but it sounded horrible and I could tell it didn't want to drive so I pulled over and had it towed. I've been working on it today, haven't found anything glaring so I made this video, mostly for audio purposes of how it sounds. Once I can tell its going to start it idles super low like it's about to stall, then it shoots up to 1500 or so rpm before dropping back down to normal rpm of 900ish. It'll hover there for a few before dropping down to 400ish. Sometimes it'll go back up to normal idle or sometimes it'll just stall out as it does here. I'm kind of leaning toward this is a fuel delivery problem or bad gas but I dunno. Any help would be appreciated. https://photos.app.goo.gl/oejjdCZyLU3mFyfN7 Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 20, 2021 Share Posted September 20, 2021 Kinda sounds like a blown head gasket. I had that issue where it would idle fine (IE going into open loop mode) then it would go back into closed loop and it would suffocate itself from the coolant intake. Link to comment Share on other sites More sharing options...
Ynot777 Posted September 21, 2021 Share Posted September 21, 2021 Possibly something simple like poor grounding would be easy to check. Inspect the ground behind the driver rear tail llight and everything on the rear bed harness. Link to comment Share on other sites More sharing options...
gogmorgo Posted September 21, 2021 Share Posted September 21, 2021 Out of curiosity, whereabouts are you? Link to comment Share on other sites More sharing options...
Jess Posted September 21, 2021 Author Share Posted September 21, 2021 48 minutes ago, Ynot777 said: Possibly something simple like poor grounding would be easy to check. Inspect the ground behind the driver rear tail llight and everything on the rear bed harness. I haven't checked that one yet but I have done all of cruisers grounding tips including adding a new ground for the fuel pump to the frame. Link to comment Share on other sites More sharing options...
Jess Posted September 21, 2021 Author Share Posted September 21, 2021 1 minute ago, gogmorgo said: Out of curiosity, whereabouts are you? Queensborough Link to comment Share on other sites More sharing options...
Jess Posted September 21, 2021 Author Share Posted September 21, 2021 25 minutes ago, Jess said: Queensborough *Richmond/New Westminster BC Link to comment Share on other sites More sharing options...
MiNi Beast Posted September 21, 2021 Share Posted September 21, 2021 Unplug tps and iac for throttle response. Check vac lines as well. Link to comment Share on other sites More sharing options...
cruiser54 Posted September 21, 2021 Share Posted September 21, 2021 Make sure intake manifold bolts have not loosened up. Carefully inspect the hose from MAP to throttle body. Link to comment Share on other sites More sharing options...
mjeff87 Posted September 21, 2021 Share Posted September 21, 2021 That sounds exactly like a bad/sticking IAC to me. I'd pull it out, inspect and clean it if nothing else. Link to comment Share on other sites More sharing options...
Pete M Posted September 21, 2021 Share Posted September 21, 2021 which of Cruiser54's MJ tips have you done so far? Link to comment Share on other sites More sharing options...
gogmorgo Posted September 21, 2021 Share Posted September 21, 2021 14 hours ago, Jess said: *Richmond/New Westminster BC Sorry… I was thinking if you were a bit closer I might have been able to offer a little more assistance, tools, etc, but I’m in Alberta. Can’t think of any forum members in the Vancouver area, either, at least not off the top of my head. Link to comment Share on other sites More sharing options...
Jess Posted September 21, 2021 Author Share Posted September 21, 2021 7 hours ago, cruiser54 said: Make sure intake manifold bolts have not loosened up. Carefully inspect the hose from MAP to throttle body. Just checked the bolts, nothing was blatantly loose but I was able to snug a few of them. Checked MAP hose, looks good. I did tip #31 about 40k miles ago but I did a thorough inspection of it a few weeks before I left on this trip. 4 hours ago, mjeff87 said: That sounds exactly like a bad/sticking IAC to me. I'd pull it out, inspect and clean it if nothing else. I inspected it, it's very clean as is the whole TB as I cleaned it before this trip. 2 hours ago, Pete M said: which of Cruiser54's MJ tips have you done so far? 1-8, 11-14, 25, 28, 29, 31, 32 and probably a few others. 1 hour ago, gogmorgo said: Sorry… I was thinking if you were a bit closer I might have been able to offer a little more assistance, tools, etc, but I’m in Alberta. Can’t think of any forum members in the Vancouver area, either, at least not off the top of my head. No worries. Thanks for the thought, appreciate it! 20 hours ago, eaglescout526 said: Kinda sounds like a blown head gasket. I had that issue where it would idle fine (IE going into open loop mode) then it would go back into closed loop and it would suffocate itself from the coolant intake. This is my biggest worry. Engine oil (from dip stick at least) looks normal. I'm going to try and source a compression tester from one of the neighbors here today and hope I can rule that out. Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 21, 2021 Share Posted September 21, 2021 14 minutes ago, Jess said: This is my biggest worry. Engine oil (from dip stick at least) looks normal. I'm going to try and source a compression tester from one of the neighbors here today and hope I can rule that out. Yeah it’s not a fun thing to suspect. And usually you won’t see a milky oil. I had the issue where oil was fine but most of the gasket failure was putting water into the combustion chambers. Hopefully the compression test will reveal something. Link to comment Share on other sites More sharing options...
DesertRat1991 Posted September 21, 2021 Share Posted September 21, 2021 21 hours ago, Jess said: Any help would be appreciated. https://photos.app.goo.gl/oejjdCZyLU3mFyfN7 She's starving. Not enough fuel or too much air. If it were a head gasket you would usually see blue or white smoke billowing from the exhaust. Since you already checked IAC, inspect all vac lines, intake hose and valve cover gasket for leaks. Do they have Autozone or O'Reilly's up there? If so, you can rent a fuel pressure tester. Link to comment Share on other sites More sharing options...
gogmorgo Posted September 21, 2021 Share Posted September 21, 2021 51 minutes ago, DesertRat1991 said: Do they have Autozone or O'Reilly's up there? If so, you can rent a fuel pressure tester. No and no, although many of the local parts chains have the same program, but a few of them have paused it due to covid. Canadian Tire and Partsource for sure had the program, Lordco might have and is my prefered parts supplier if an option. I’ve seen reference to Napa renting out tools as well but my local one doesn’t. Probably better to call ahead. If you’re looking for cheap single-use tools for purchase, Princess Auto is the go-to, although any parts chain will have tools for sale. Link to comment Share on other sites More sharing options...
Jess Posted September 22, 2021 Author Share Posted September 22, 2021 10 hours ago, DesertRat1991 said: She's starving. Not enough fuel or too much air. If it were a head gasket you would usually see blue or white smoke billowing from the exhaust. Since you already checked IAC, inspect all vac lines, intake hose and valve cover gasket for leaks. Do they have Autozone or O'Reilly's up there? If so, you can rent a fuel pressure tester. I don't see any smoke. I called Lordco, Napa & Canadian Tire and Canadian Tire is the only one with tool rentals but the friend I'm visiting has a mechanic friend who's letting me borrow a fuel pressure tester and hopefully a compression tester tomorrow. The neighbor here did have a vacuum gauge which was reading 20-25Hg at normal idle (while it lasted). No idea how accurate his gauge is. I used the vacuum reservoir port on the intake manifold. I went over every vacuum line and ground point today and couldn't find anything. Link to comment Share on other sites More sharing options...
Ωhm Posted September 22, 2021 Share Posted September 22, 2021 Watch the video. That packard connector for the, I think, TPS has a cracked hold down cover latch. Link to comment Share on other sites More sharing options...
Jess Posted September 22, 2021 Author Share Posted September 22, 2021 4 hours ago, Ωhm said: Watch the video. That packard connector for the, I think, TPS has a cracked hold down cover latch. Yeah that just broke a couple months ago when I put inna new TPS. The clip on the IAC connector has been broken for years as well. Both are on my to-do list. Link to comment Share on other sites More sharing options...
Jess Posted September 23, 2021 Author Share Posted September 23, 2021 I'm getting around 8psi key on/engine off and 15psi at idle until it stalls then it very quickly drops to 0. No change in psi removing the vacuum line on the pressure regulator. Link to comment Share on other sites More sharing options...
cruiser54 Posted September 23, 2021 Share Posted September 23, 2021 Check to see how much voltage you have at the pump connector. Orange wire I believe. If you have about 12 volts, likely your fuel pump is bad or the internal rubber hose is messed up. Link to comment Share on other sites More sharing options...
Jess Posted September 23, 2021 Author Share Posted September 23, 2021 8 minutes ago, cruiser54 said: Check to see how much voltage you have at the pump connector. Orange wire I believe. If you have about 12 volts, likely your fuel pump is bad or the internal rubber hose is messed up. 9.75v with engine on Link to comment Share on other sites More sharing options...
cruiser54 Posted September 23, 2021 Share Posted September 23, 2021 That was fast!! Have you bypassed the fuel pump ballast resistor or is it still stock? Link to comment Share on other sites More sharing options...
Jess Posted September 23, 2021 Author Share Posted September 23, 2021 Just now, cruiser54 said: That was fast!! Have you bypassed the fuel pump ballast resistor or is it still stock? Still stock. But I did try jumpering the wires together the other day to see if it would do anything (it didn't). Link to comment Share on other sites More sharing options...
Jess Posted September 23, 2021 Author Share Posted September 23, 2021 7 minutes ago, Jess said: Still stock. But I did try jumpering the wires together the other day to see if it would do anything (it didn't). Maybe that isn't the correct way to bypass it? Link to comment Share on other sites More sharing options...
Recommended Posts
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 accountSign in
Already have an account? Sign in here.
Sign In Now