6
votes
2answers
2k views

ECM vs. PCM vs. ECU?

Engine Control Module Powertrain Control Module Engine Control Unit Reading about them online, they seem to be the same thing, computers. So what are the spcific difference between them? Is the other ...
4
votes
0answers
24 views

No fuel pressure

97 Ford f350 7.3 turbo with duel tank set up ..... I need to know a few things. 1) what can cause no fuel to pump into the fuel bowl, other than the camshaft and the mechanical fuel pump? 2) with a ...
3
votes
3answers
312 views

2004 powerstroke white smoke now no start

I have been trying to fix my truck for a while so long story. I need help bought a 2004 power stroke with 100k miles. It ran well for 15k miles then started having low power for first few minutes to ...
3
votes
0answers
46 views

Is there a rev matching device?

I understand that rev matching is acquired skill by practicing and driving more. I'd like to know if there was a device you could attach to your car that would detect and notify you if engine rev is ...
2
votes
1answer
196 views

How do I know if car ECU has a REV Limiter?

My car is fairly new and not that well documented online (it's a new model from late 2015) For safety, how do I know if my car has a REV-limiter without testing it and letting it go up the red line ...
5
votes
2answers
190 views

What does NM@rpm mean in car's spec sheet?

I checked my car's specs sheet this morning and in it I noticed: Torque NM@rpm: 145@4600 What does NM@rpm mean?
3
votes
1answer
83 views

What does BHP@rpm mean?

In my car's specs sheet I noticed: Power (BHP@rpm): 117@6600 What does BHP@rpm mean?
3
votes
2answers
69 views

Higher idle RPM on first start at morning

Unlike starting the car in the afternoon, after you've already started it at another time of the day. I understand that the higher RPM can be because of the temperature, however on hot days it's still ...
1
vote
2answers
101 views

Hyundai XG350 - Positive or Negative Ground Battery?

I have a 2002 Hyundai XG350, and all of the wires from the battery run out of sight before connecting to the chassis. There is only one wire coming off of the negative, and a number of different ...
4
votes
2answers
102 views

My car locks lower gears when on high speed, why?

When I'm on say 50 Km/h my first gear is not accesible and second gear is too, 3rd gear however is hard to push in but 4th gear is easy to slip in, why?
7
votes
1answer
127 views

Is it really not advisable to let your fuel tank get low on fuel?

I have frequently heard people blaming engine problems on letting the fuel in the fuel tank get too low, in so doing allowing sediment to be sucked into the fuel pump, which then causes a blockage. I ...
3
votes
1answer
44 views

Driving simulation while on front jackstands

I have a 2007 Tacoma, 4WD. I wanted to perform a driving simulation but with the truck being still in order to troubleshoot a rattling sound I can't reproduce when the engine is idling but the ...
0
votes
4answers
44 views

STEERING ISSUE 99 TAURUS

My daughters 99 Ford Taurus recently started having steering issues. Noticed it on a recent ice covered road. Here is the issue: you go down the road & sometimes the driver side front wheel is ...
3
votes
0answers
53 views

“Missing” motor

My Subaru Forester 2003 runs fine until I go up steep inclines when it starts to loose power and goes into "limp mode" (ie shut down). I can restart it okay but the same thing happens after a while ...
23
votes
8answers
2k views

Are tyre repair kits a viable alternative for a spare wheel?

I would REALLY like to get rid of my spare wheel. The wheel is heavy and I need the spare wheel well for... other purposes. In my history of driving I never had to use the spare wheel, so it cost me a ...
3
votes
0answers
85 views

BMW 320D 2011 ED - Engine Malfunction Icon

driving back from work and this warning light came on.. the car wet into limp mode but then was ok after 1 second. No lights on after that! today the same thing happened driving to work came on for 1 ...
13
votes
4answers
2k views

What are the pros and cons of fiberglass body?

Fiberglass is a prominent material for building boats. It's well-tested and durable. Over the years, there have been few attempts to adopt fiberglass as in automotive industry: Glasspar G2 - a 1950 ...
4
votes
1answer
165 views

Rear Window Defogger with only one terminal

Does the rear window defogger only work with both side terminals connected? I observed that one of the terminal of my rear window is broken, so is it that now it wont even defog half of the screen? ...
2
votes
1answer
57 views

No water flow in the radiator - 99 Cadillac STS

What's wrong when water doesn't flow from your radiator. I already put a water pump and a thermostat on putits still running hot. What could be the problem?
5
votes
1answer
78 views

Identify serial protocol in Honda Odyssey 2007

I'm trying to figure out what is the serial protocol that is used in Honda Odyssey 2007 for communication between RES (rear entertainment system) DVD drive and main audio head. I was convinced it ...
3
votes
0answers
39 views

Feedback coming from gas pedal on 14 ' Audi S4 (B8.5)

Sometimes I feel some sort of internal feedback coming from gas pedal. It is a really interesting feeling that is hard to explain, almost as if a piece of thick wire is rubbing on the inside of the ...
6
votes
2answers
448 views

How to Identify which O2 sensor is faulty WITHOUT readings from the car's system

I have a 2005 Hyundai Accent, and the check engine light is on. I'm almost 100% sure it's the O2 sensor because it's not as fuel efficient as usual... My work schedule conflicts with mechanics around ...
0
votes
1answer
37 views

98 Olds Intrigue headlights turn off when driving turn back on by using switch

When I'm driving in cold weather, the headlights (which turn on automatically) go out. I can turn them on with the manual switch. Which relay or fuse does controls this? Does anyone have a number or ...
5
votes
1answer
378 views

Is Torque App reliable to read O2 sensor data?

My 2006 Toyota Prius is throwing code P0420 and I used a cheap OBD-II reader with Torque App on Android to check if my O2 sensors are working or not. I tried the maintenance mode to just run the ...
3
votes
1answer
143 views

2002 Toyota Camry LE trunk lid will not open

We've got a 2002 Toyota Camry LE, the trunk won't open. We've tried the key fob button, the release in the front of the car by the driver side seat, the Emergency pull handle inside the trunk itself ...
1
vote
0answers
78 views

After many repairs engine still vibrates (1995 Ford Probe, 4-cylinder, automatic)

If memory serves me correctly, repairs / replacements include: all mounts (engine and transmission), torque converter, entire electrical system, harmonic balancer pulley, various sensors, checked for ...
3
votes
1answer
99 views

Honda civic '97 crank, no start. Once started, drives fine

So over the weekend when I tried starting my car up with the fuel running from reserve (I know, times are tough), it didn't crank. We tried kick starting it, nothing. My neighbour went to get some ...
5
votes
1answer
57 views

Lubricating Spring Compresor Threads

I'm getting ready to replace the struts on one of my vehicles using a set of ampro T70570 coil spring compressors: I had vaguely remembered reading somewhere that it's a good idea to oil the ...
3
votes
2answers
109 views

Could a modern car be modded enough to work without ECUs?

With enough time and skill sets, could a modern car be modded enough to work without microprocessors? Having machining skills and a fitted workshop, without buying a new motor block or transmission. ...
1
vote
0answers
24 views

Is it safe to lift up your wipers in cold weather? [duplicate]

Lifting up your wipers prevent them from sticking to the windshield in freezing weather. However, is it safe to do so? I'm concerned the wipers might get frozen / stuck while they are upright, causing ...
5
votes
3answers
71 views

How can you unfreeze frozen windshield fluid?

The windshield fluid stops coming out of the nozzle in cold weather, leading me to suspect the fluid is freezing somewhere. I checked the tank and its full (and liquid). Also, liquid starts coming ...
8
votes
2answers
82 views

Does an Engine Strut Bar have any effect on performance?

I just bought a 1988 foxbody and I'm currently working on restoring it and then maybe in the future do some engine improvements. I've had many people tell me to avoid this, as my car isn't going to ...
7
votes
1answer
145 views

How is video transmitted in the car? (E.g., from backup camera to NAV display.)

Does video from the backup camera or side mirror camera travel to the (NAV) display via the CAN bus or some other mechanism? I'm really curious if you can get access in some way to that video - or ...
7
votes
1answer
169 views

How can I jump the solenoid in a starter?

My friend and I recently tried to investigate why his dad's '98 Pajero wasn't starting after heavy rains. After establishing that the starter relay was fine, I was hoping that tapping the starter ...
4
votes
2answers
362 views

Coolant boiling and smoke coming out of engine bay

I have a 1995 Toyota Camry SE that has 195,000+ miles that has started to develop some serious problems. Aside from what I believe to be an issue with the transmission, the car had been running ...
15
votes
3answers
1k views

Why are there multiple CAN buses in vehicles?

There are a number of questions on the CAN bus but none (so far as I can tell) that explain why there are several CAN buses in a vehicle. From what I understand many different nodes can be connected ...
3
votes
1answer
96 views

Oxygen sensor malfunction

2005 Toyota Tundra v8 This truck overheats with no radiator fluid loss. Also had power loss. Motor shake. Codes came back with a voltage high/low and both oxygen sensors upstream needed replacement. ...
2
votes
1answer
45 views

Squealing noise and battery gage drops

I have a 1989 Chevy z71 pickup truck. The engine makes a squealing noise and I noticed the battery gage drops down as well. Replaced the idler pulley already. Battery is new also. The squealing ...
5
votes
1answer
168 views

Security and engine issues

I have a fiat stilo 1.4(2004) plate. It had an intermittent issue with the "car security manager loose connection" and the car wouldn't start sometimes, But when shaking the fuse box/power ...
4
votes
0answers
70 views

Reason for high petrol useage (Ford Focus Titanium 2013)

I'll start off with the car specs: 2013 Ford Focus Titanium Navigator 1.6L with about 39k miles on the clock. I recently checked the oil on the engine and it was on the bottom notch of the dipstick....
5
votes
1answer
398 views

Possible cause for piston melt in CNG 6 cylinder?

I don't have engine overheat complaint. There was sufficient engine oil and coolant. Oil pressure also at specified rate? Always I am having this issue on first cylinder at maximum time?
6
votes
1answer
142 views

Why do cars still use mechanical blinker relays?

I think the electronic relays may be cheaper; and having less moving parts they are theoretically less prone to break. So, why do cars still use mechanical relays for turning lights?
8
votes
1answer
169 views

Will slamming doors shut damage my car?

I hate it when people slam my car doors shut, as I am convinced that they will bend and will create wind noise. Is it bad to slam car doors? Will it cause the doors to bend?
7
votes
2answers
72 views

Occasional ABS fault

'04 Cavalier, 120K mi. We've had it for 6 years, driven every winter. Now, this winter, we occasionally get an ABS fault. This probably always occurs under slipping conditions. When it happens, ...
8
votes
1answer
313 views

Can i use ATF for power steering?

Can i use ATF dexron3/mercon in power steering reservoir in my '04 toyota 4runner. owners manual calls for dexron 2 or 3. i don't know what mercon is.
19
votes
7answers
3k views

Are manual transmission cars disappearing? [closed]

You don't have to be an expert to notice that over time, the percentage of manual transmission cars has lowered. Automatic cars are not only more popular, but more comfortable, easier to use and ...
5
votes
3answers
148 views

Why does my garage insist on using an engine flush when changing the oil?

My car handbook lists what should be done at each service, and it does not say “engine flush” should be used. The main dealers don’t use it. Yet most small garages seem to insist on using it at ...
5
votes
1answer
41 views

Brake malfunction indicator turns on, all gauges die off, but engine and brakes still work

The car is a Volvo S80, produced in 1998 for the European market. Under some non-reproducible condition (it is in fact so non-reproducible that it appears random), emergency lights in the dashboard ...
21
votes
7answers
6k views

What's the point of servicing a car?

As you can probably tell from the question, I know almost nothing about motor vehicles. So apologies for my ignorance but I wasn't sure where else I might get this question answered impartially. ...
10
votes
1answer
200 views

Cleaning mud from motorcycle radiator

Can anyone suggest a non damaging way to clean my muddy radiator? Preferably without removing it from the bike. Thanks! Update, after cleaning it with sprayed hot water and small brushes: Note:...

15 30 50 per page