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Questions tagged [truck]

A light, medium, or heavy duty vehicle often used for transporting goods. Frequently used to refer to consumer pickup trucks (light duty), but can also refer to large panel vans and diesel utility trucks (medium duty), and large 3-axle diesel trucks (heavy duty, aka lorry, big-rigs, semi-trucks).

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50
votes
6answers
45k views

Why do heavy vehicles almost always use diesel engines?

I have always wondered why heavy vehicles such as large trucks and buses almost always use diesel engines, whereas in light cars there is a choice between diesel and gasoline engines. Engine ...
21
votes
4answers
4k views

What are these loops in the brake line for?

I was watching a show on the Velocity network about truck modifications, and I saw the following closeup of the trucks master cylinder and booster. What I don't know is why the designers put the ...
13
votes
1answer
485 views

1987 Dodge D150 High Idle and Dieseling

Truck is the high altitude/California emissions model, 318. Carburetor has been replaced with a 4 barrel Holley 4160 I believe, although it might be a 4150, intake manifold was replaced to fit the ...
9
votes
2answers
576 views

Why are the spark plugs from the same 2 cylinders corroding faster than the others?

On my engine ('99, 360 v8 Magnum), I replaced the spark plugs less than 15k miles ago, because of misfires in cylinders 2 and 8. Those two plugs were badly corroded. Today I had to replace them again, ...
9
votes
2answers
12k views

No power but battery, alternator, and connection are good

This involves a company truck, 08 Chevy Silverado. I am not a mechanic or DIY nor do I play one on TV. The problem I am having is that every 2 or 3 months this truck will not start and completely ...
8
votes
3answers
20k views

Why do trucks have a plastic flap under the front bumper?

I've noticed today's trucks have this 3-4" plastic guard that runs along the bottom of the front bumper. It strikes me as something that would hinder ground clearance or otherwise brush into things. ...
8
votes
1answer
104 views

Purpose of highlighted mirrors in trucks

Whenever I see pictures of trucks made by Volvo, Scania or Daimler. I wonder what are the highlighted mirrors in the picture used for? I don't see those mirrors in most trucks made by Indian ...
7
votes
3answers
1k views

Cause of double trailer dump truck brake lockup

Earlier today I was driving behind a double-trailer dump truck configured something like this: As we approached a red light, the driver obviously applied the brakes, and for the last 50 or so feet ...
7
votes
2answers
4k views

What problems can come from AC not running for years?

I have an 81 Chevy C10 that I inherited from my dad. This truck has mostly sat for the last seven years, with me running it enough to keep it in condition. I've been using this truck mainly for the ...
6
votes
3answers
2k views

How to do minor repairs to a radiator?

I have a radiator in my truck that has a slow leak which looks like it is oozing a little bit in between some of the fins. What are some of the ways to repair a radiator without replacing it? At ...
6
votes
2answers
2k views

How much horsepower to expect from a cold air intake in Dodge Ram

It's a 1999 Dodge Ram 1500 4x4, Laramie SLT, automatic transmission, 5.9l magnum engine, and crew cab (222k mi). I have a friend who could put a cold air intake on it, with a new hood. But I have a ...
6
votes
1answer
441 views

Load on bed of pickup for extended period of time

I just got a Toyota Tacoma 2012 Sport long bed. I'm an artist and I make driftwood horse sculptures. I have two horses on the bed of the truck currently which comes to about 500 lbs. I intend to ...
6
votes
1answer
10k views

What does this symbol on my dash mean? GMC W4500

The light can be switched on or off by operation of the stem on the right of the steering wheel, the same control that operates the windshield wipers. I can't detect any difference whether it is on ...
6
votes
2answers
9k views

Scania clutch issue with syncromesh gearbox

The clutch of our 124 Scania stopped working properly with the "14 speed" syncromesh gearbox. The first time it happened, it ground instead of smoothly going into reverse (a non-syncro gear), to back ...
6
votes
1answer
39k views

1991 Chevrolet S10 - Sputtering, hiccups, stalling, bad acceleration

I'm having a problem with my pickup; It's a 1991 Chevy S10, 2WD P/U, 2.5L I4 engine with around 185,000 miles on it. It's the Iron Duke engine, a throttle body injection motor. I'm not a mechanic, ...
5
votes
7answers
1k views

Headaches when driving older pickup truck

I have a 1994 Ford F-150 4.9 L6 that I have fixed up and would like to DD. When I drive it long enough to get to operating temperature, I will eventually get a headache that is similar to the headache ...
5
votes
2answers
5k views

Can I install a plow on my stock Silverado?

I've got a Chevrolet Silverado 1500 LS 4x4, and I'd like to install a plow. I want to avoid damaging the truck, as it's also my primary means of transportation. Do I have to do anything to stiffen ...
5
votes
2answers
625 views

How can I determine the turning profile of an articulated vehicle?

I'm working on a project that requires me to design an overload control centre where overloaded trucks are allowed to redistribute or shed some of it's cargo in order to continue to travel on the ...
5
votes
1answer
485 views

How to build a palm coupling to compressed air coupling adapter?

Trucks use yellow and red coded ISO 1728 "palm couplings" for connecting the air supply and braking compressed air lines from the towing vehicle to a trailer. I want to build an adapter from the ...
5
votes
2answers
220 views

Where is a good place for the license plate light on a 1991 Ford F-250?

I have a 1991 Ford F-250 here that doesn't have a light on the license plate. It's not obvious where the lights were before, but it looks like may have been replaced with sockets for a trailer's ...
5
votes
1answer
5k views

Engine noise and smoke while driving with low oil, no longer starts

I have a 1971 Ford F250 XLT. I was driving it down the highway and I realized I needed oil badly. I told my wife "we gotta get oil first thing tomorrow" and she said okay. 5 minutes later, 10 minutes ...
5
votes
3answers
2k views

Trouble with lights on truck, using dc-dc converter & flasher unit

I have a friend who has asked me to help him sort out his truck lighting. It is a 24v truck with a 24-12v dc-dc converter for the body. It has 2 flashing lights, that when active make all the other ...
5
votes
3answers
3k views

2003 Dodge Ram 1500 3.7 engine knock

My truck has been making a knocking noise upon acceleration. Today the knocking is constant and louder. What could this be? Pistons? Oil sludge? New motor?
4
votes
1answer
360 views

Wish to understand why non-stock vehicle alignment is an issue

I just replaced all of my suspension components (Shocks, Springs, Hangers, Shackles) on my Ford Excursion with that of an F350 + a few modifications to make the rake appear level. I also have slightly ...
4
votes
4answers
58k views

How to disable the seat belt alarm on a 2011 Tacoma?

I do a lot of slow driving with multiple stops on trails and farm roads and the seat belt alarm becomes very annoying. I attempted the following steps to disable the beeping, but they didn't work. I ...
4
votes
1answer
126 views

What is this connector on the rear bumper?

This is a picture of the rear bumper of a 2016 Chevy Colorado: On the left is a harness for 4- and 7-pin trailer connectors. In the center is the license plate (blurred). What is the circular ...
4
votes
2answers
269 views

E85 in my 1988 ford F-150 XLT Lariat

I put E85 in my Ford F150 xlt lariat 302 2wd truck for the first time I think it's ever been used, an now there is a slight shake in the engine when I accelerate also it's difficult to get my truck to ...
4
votes
2answers
441 views

Offroad Kit - Are the brakes replaced?

I have a 2000 Ford Ranger that a previous owner modified by adding an offroad kit to it. I don't have a picture of the suspension system at the moment, but this one is pretty close in terms of wheel ...
4
votes
2answers
5k views

Occasional Vibration at specific highway speeds.

Symptom: At certain speeds (70 mph, 40 mph, etc.) there is a noticeable vibration. Vehicle: 1998 GMC Sonoma (2 wheel drive) The vehicle was purchased used and had similar symptoms at the time. ...
4
votes
1answer
82 views

Coil Spring Load and Ride Quality

Is there a difference in coil spring load between different engine options for the same model truck? For example, I have a 1993 C1500 with a 5.7L. Can I use coil springs from another 1993 C1500 but ...
4
votes
3answers
4k views

How do I unstick my tailgate?

I have a Mazda B2300 pickup with its tailgate stuck in the up position. The release lever doesn't require as much force to pull any more, and only one end seems to be releasing when I pull it. Any ...
4
votes
2answers
2k views

What do I make a custom box truck body out of?

I'm working on a box vehicle conversion project, and I need to replace the main body. It looks like the original method was steel frame, plywood on top of that, and large sheets of galvanized steel ...
4
votes
1answer
342 views

What was the first mass production pickup?

I believe Henry Ford was essentially the father of the mass production car. When was the pickup truck invented? Who created the first mass production pickup?
4
votes
3answers
8k views

2006 Nissan Titan makes odd sound, but only at certain speeds

My 2006 Nissan Titan makes an odd sound, like a grinder, mostly when travelling steady at 35, 40 or 45 miles per hour. Even 1-2 mile per hour difference will cause the noise to stop. The noise will ...
4
votes
5answers
84k views

Random Cylinder Misfire in Cylinders 2, 5, 6, and 8; P0300; Chevy Silverado 1500 4WD

Yesterday on the way to work my 2000 Chevrolet Silverado 1500 4WD with the 4.8L V8 Vortec engine started flashing a check engine light. I read it and it was a P0300 Random/Multiple Misfire. I had ...
4
votes
2answers
122 views

1999 Dodge Ram - New Mirrors, Weird Behavior

I recently purchased replacement mirrors for my '99 Dodge Ram 1500. When I put the door back together and tested, I found that when I tried to move the mirror leftwards or upwards, the mirror on the ...
4
votes
2answers
3k views

1990 Toyota Pickup 22re fuel injection EFI relay is getting hot

While driving my truck, the engine stopped dead, like it ran out of gas. I used a by-pass wire to go around the EFI and Circuit open relay, the truck ran fine. I noticed a ground wire leading from the ...
4
votes
1answer
105 views

Changed brake pads and bled the system, but brakes go mushy when engine is running

2007 Ford F150 4x4 After changing the brake pads and front rotors, bleeding was done and the brakes felt great. While the vehicle was still on the jack stands, I started the engine and now the ...
3
votes
4answers
13k views

Should I over- or under-inflate my tires when towing?

We're about to take a trip across the country towing 5000lb (2300kg) with our SUV. It's rated for 9k, so I'm not worried about that, but I'd like to know how much to inflate my tires. Advice on the ...
3
votes
1answer
42 views

Tire chains appear to touch suspension components?

Years ago I bought some chains for my truck (2005 Tacoma 4x4) just in case I'd ever need them. I have tires sized 265/65-17 and I have confirmed that these chains are intended to fit that size tire. ...
3
votes
4answers
12k views

Slow acceleration, high fuel consumption after spark plug change

I have a 2000 Ford Ranger 4.0 L V6 4x4 model. I recently was having some problems with the truck idling too low when cold and I decided to change the spark plugs. I put in 4 out of the 6 new plugs and ...
3
votes
2answers
321 views

24V truck charging circuit problem

I want to diagnose a faulty charging system in a European coach bus ('99 Neoplan). It has 2x 12V batteries in series and also two alternators. With the engine running I measure ~21V across the end ...
3
votes
2answers
3k views

Engine idle surging on startup & sputters during acceleration

So I don't know anything about cars. But my truck has been having a few problems. It starts up fine and then the idle is really weird, the RPM's surge. The motor keeps bogging down and when you try to ...
3
votes
2answers
58 views

why does my truck shake when I go 35 miles an hour down the road?

I am running 38s on my Toyota 1984 and I think it shakes because i mean i am running 38's on a Toyota but also that maybe they are out of alignment or that they are just low but im not sure...
3
votes
1answer
552 views

Truck will not move forward in drive

I have a Mazda B2500 from the late 90s - early 2000s. It will not move forward in drive, but it will move in either reverse, 2nd gear or 1st gear. Is it safe to be consistently driving in 2nd or 1st ...
3
votes
3answers
4k views

2003 Ram 1500 4.7 Misfiring Cylinder 3

Would a bad fuel injector cause plug not to fire? Weird voltages at harness for cylinder 3 compared to other cylinders. No spark at plug. Coil and plug new and tested on other cylinders. I am leaning ...
3
votes
0answers
2k views

Mercedes Atego OBD2 live data codes [closed]

I have tried to connect an OBDII ELM327 adapter in Mercedes Atego. Somehow I managed to get it in that OBD2 connector. I can see that my adapter is receiving electricity. These are the PID's that I ...
2
votes
4answers
13k views

Why is there a “DO NOT PUSH” sign on the back of some trucks?

I often see a "DO NOT PUSH" sign on the back of trucks (I believe they have all been large semi-trailer dump trucks). I've even seen "YOU PUSH IT YOU OWN IT" signs on a few. This raises two questions ...
2
votes
2answers
2k views

Why Don't Medium Duty and Heavy Duty Trucks require Airbags?

Why Don't Medium Duty and Heavy Duty Trucks require Airbags? According to GSO 42 regulation, Passenger Cars, MPV, Trucks or Buses with GVW less than 3500Kg requires an airbag, while for MDT & HDT ...
2
votes
2answers
375 views

Is this a headlamp housing or a headlight bracket?

I have a 2015 Ram 1500 Crew Cab Sport 4WD. Something on or near the driver side headlamp is broken: The dealership is quoting me $600 to fix this broken piece of plastic, so I want to search ...