8
votes
5answers
12k views

Is the vent from the pcv valve back into the air intake really needed?

After working on my car, I didn't bother to reattached the line from the pcv valve into the air intake before testing the motor. It ran normally. This made me question whether I need to even return it ...
0
votes
1answer
9 views

Brakes or front tie rods

I have a 03 Nissan Altima Se 3.5v I had my tie rods replaced all new and that same sound it makes when that went bad is back I noticed the boot had came loose and I had to reattach the boot and add ...
0
votes
0answers
9 views

Thumping noise after pad and rotor replacement

I recently had my front pads and rotor replaced on my 2012 Jeep Patriot but within one week I heard a thumping sound when breaking. The repair shop warrantied out both the rotors, and when the ...
5
votes
1answer
30 views

How to diagnose low alternator output

My car (a 1991 Citroen BX 1.4) has been giving me alternator problems since I got it, the alternator failure came on every now and then and dimmed or disappeared when I revved the engine, my first ...
2
votes
3answers
21 views

2004 Mazda 3 runs out of gas while gauge still show fuel

My car first ran out of gas at a quarter tank of gas. A few weeks later it ran out at half a tank. Then it started dieing while driving down the road and now it won't start at all. It will turn over ...
6
votes
3answers
916 views

Will an auxiliary battery hurt a vehicle's alternator?

I am going to be road tripping and living out of my SUV for a while. I need a way to power a tiny portable cooler/fridge 24/7 and would like to be able to power my cell phone, laptop, and maybe a few ...
0
votes
1answer
737 views

Proper power steering fluid for Buick Enclave?

Can I put Prestone power steering fluid into a Buick Enclave? Or does it require OEM fluid?
0
votes
1answer
183 views

Two 12 volt power sources into one device

How can I power one 12 volt outlet (feeding a XM radio transformer) from two separate 12 volt sources on a RV (ignition and coach power). Is it feasible to use 2 diodes?
0
votes
1answer
63 views

how to boost petrol engine of a small hatchback

I want to boost 1.2 litre petrol engine of my hatchback. What are possible ways for it except adding a supercharger?
3
votes
2answers
146 views

Given the following scenario, what type of engine (diesel or petrol) allows for greater acceleration and/or top speed?

I know this isn't exactly a Motor Vehicle Maintenance & Repair related question but this seems the most appropriate StackExchange community to ask it. I apologize if I am being wrong in my ...
1
vote
0answers
37 views

Need help installing Pioneer car stereo in 2006 Hyundai Sonata (power antenna)

I have a 2006 Hyundai Sonata and am switching over my brand new radio from my old car. The radio I have is a Pioneer AVH-2800BS. According to Crutchfield (which I know and trust by heart!), it says "...
6
votes
4answers
5k views

Does accelerating faster worsen fuel efficiency?

I've often heard that accelerating harder makes for bad fuel efficiency, but have yet to be given a sound explanation of why. Naturally this makes me question this advice. Now obviously when you ...
1
vote
0answers
12 views

2001 WR426F Leaks a bit of oil out of the breather tube, is it normal?

I have a WR426F that after a bit of trailing has a small (couple drops) puddle of oil underneath it after sitting a bit. It seems to be coming from the breather tube, is that normal? I also have a ...
4
votes
4answers
21 views

Overheating in E-46, 3.23i

My BMW E-46, 3.23i temperature is always going to the red zone. My water pump is fine, the thermostat is okies, but the hose on top is hot and swollen. The lower hose, however, is cold and fine. I ...
1
vote
1answer
23 views

Intermittent power failure in hot weather 2007 Escalade

We have a 2007 Escalade with 160k miles. The car runs great normally, but when the weather gets hot, an array of warning lights will come on from time to time, the power will drop for a moment (radio ...
2
votes
1answer
17 views

Drove with extremely low oil, engine light on

I drive a 2011 Honda Odyssey. The last time I had my oil changed, they neglected to reset the oil change indicator (relevant because I'm assuming it would have come back on sooner when my oil level ...
3
votes
1answer
10 views

2006 Hummer H3's radio (Pioneer NEX 4200) turns back on after the car is off

I am having an issue where after my car is off for a while the radio will turn back on and stay on until the battery is drained. I have had a large Chevy dealership along with Best Buy's automotive ...
35
votes
9answers
82k views

What actually happens when there is not enough oil in a car engine?

When a car is topped up with oil, it clear to most people that you are supposed to fill it to the recommended amount as specified by the manufacturer (normally on a dip stick). What exactly are all ...
5
votes
10answers
21k views

1999 Mazda 626 Shakes when Idle

I've got a 1999 Mazda 626 that shakes really badly when idling. It gets a little better when put into neutral, but not much. I've had two people suggest possibilities: Fuel filter Vacuum hose ...
5
votes
1answer
40 views

2005 Hyundai Santa Fe Won't Start

I have an '05 Santa Fe with the 2.7L engine that won't start. I bought it this way. Was told that car died and was towed home. Found that alternator was bad. While they were replacing alternator they ...
6
votes
2answers
48 views

How did luxury cars provide smoother rides without active suspensions?

It seems all luxury cars have active suspensions now, so it's not a fair comparison to "non-active" cars. But I was recently driving a mid-2000 Mercedes E-class over the same roads I normally travel ...
5
votes
0answers
23 views

bore/stroke question

I'm wondering whats the limit for how over-square a motorcycle engine can be... I know all sport bikes i looked at had just under 25 m/s piston speed regardless of the stroke/rpm... So i'm wondering,...
2
votes
1answer
33 views

250 cc scooter CVT belt repair problem

I have a 2008 Qlink Legacy and the CVT belt broke the other day. I was riding when there was a pop and the bike lost power to the rear wheel. I took the CVT cover off and removed the old belt that was ...
10
votes
6answers
638 views

Is this tire puncture able to be plugged?

My wife picked up a rather large screw in her tire. It's a very clean entry, but I'm pretty sure it's too large to plug the hole. One shop even said as much, but I figured I'd get a second opinion ...
5
votes
1answer
27 views

My 2004 Audi a4 is making a gurgling noise from my engine

My 2004 Audi a4 is making a gurgling noise from my engine. I am also having to constantly put antifreeze in it. Is this related? I know I'll have to take her to be looked at but can anyone tell me ...
5
votes
1answer
16 views

Speaker setup in Subaru Impreza

I recently had an Alpine INE-W960A Navigation head unit and SPR-60C component speakers installed in my 2016 Impreza hatchback. As my budget was limited I did not replace the rear door speakers at the ...
2
votes
1answer
17 views

Higher CCA in batteries in warmer climates

If a battery with a higher CCA capacity is used in a warmer climate, would it effect the battery's performance in the longer run?
2
votes
1answer
17 views

Activa engine noise

My neighbor and I purchased an Activa 3g at the same time. When my bike is in idle (just after immediate start) as well in running condition, it sounds little bigger/ rough noisy like dub dub... Also, ...
4
votes
1answer
12k views

Hard shuttering and engine dies when A/C is on at idle

When the car is idling and the A/C is turned the engine will shutter hard and/or turn off. I've already replaced the IAC valve; it was working for a little, but now it's back to shutting off. The ...
7
votes
2answers
37 views

How do you remove a broken oil dipstick tube?

I broke it off by mistake and am trying to replace it. Here's what I'm looking at. and here's what I've tried so far. If I try the green one I can pull very hard but it doesn't come loose. I can ...
4
votes
2answers
18 views

Fuel Type (octane) for Mazda Axela 2010

I bought an imported (from Japan) Mazda Axela 2010 (i-stop, 1990cc, sedan) and the dealer asked me to use 95 octane petrol. There are a lot of misconceptions about octane and I heard many dealers ...
21
votes
7answers
92k views

What are the risks of overfilling a small engine with oil?

I recently overfilled a 4 stroke lawnmower engine with oil. It has been run for about 1.5 hours while overfilled. It smokes a lot right after being started but after 30 seconds or so the smoke clears. ...
11
votes
5answers
4k views

What happens if unsuitable oil is used in a vehicle engine?

I recently heard an urban legend-like story about a guy in a developing country who decided engine oil was too expensive and so used some vegetable oil instead. The story says the car ran for some ...
7
votes
1answer
59 views

Rumble strip noise on 1999 F250

I have the "sounds like driving on a rumble strip when I hit a bump" problem. I've read through the many threads about it on other sites and I'm trying to narrow down the cause for mine. There are ...
5
votes
0answers
19 views

Intermittant starting problem

1967 Camaro SS 350 with Powerglide trans. sometimes will not start. No click, no dimming of lights when key is turned, nothing happens. It will do this maybe one time out of 15 or 20 starting ...
5
votes
0answers
13 views

04 GMC Savanna G2500 4.8 V8 No Power

First time I looked at this the A/C compressor clutch wasn't engaging. Long story short: the high side pressure switch on the back of the compressor was unplugged. Noted that the engine was shaking (...
4
votes
2answers
121 views

High beams work, low beams do not. What is wrong with headlight?

I have a 2000 Jeep Wrangler TJ and the high beams work but the low beams don't. I replaced one of the relays under the hood and the high beams started working but the low beams still don't work. What ...
4
votes
2answers
156 views

2000 Toyota Sienna Rear Blinker Assembly Clips Broke Off

I recently took off the tail light on our 2000 Toyota Sienna and the clips on the light assembly side broke off as I was pulling it off. Any idea where I can get replacement clips? Or would I have to ...
3
votes
1answer
16 views

Strange dull areas on paintwork after trip to bodyshop

After a crash I had some work done to my car at an Audi approved bodyshop. This involved some respraying. Since I've got it back I've noticed dull matte marks on one side of the paintwork. They seem ...
12
votes
3answers
369 views

Diesel Engine Runaway - What is it?

I was watching some youtube videos and diesel engine runaway videos started to pop up where apparently the diesel engine runs out of control until it destroys itself. My Question What is diesel ...
4
votes
0answers
26 views

Discharging alternators

I had to replace the original alternator on my '99 Z28 Camaro in January and have had 3 after market and 1 OE and all continue to discharge with air and radio on. Mechanic says it is fine but I think ...
4
votes
4answers
85 views

Front brake caliper mounting bracket out of alignment with rotor

When the brake caliper mounting bracket bolts are tightened to the hub (on the passenger side only!), the new rotor binds against the bottom of the bracket on the outside (away from the center of the ...
3
votes
1answer
28 views

Where is the Nissan Rogue purge valve?

Friend has a 08/09 Nissan Rogue with the check engine light on. Ran my OBD2 scanner on it and pulled a single code, P0444, which indicates per my search the Purge Control Solenoid Valve. When I ...
4
votes
1answer
22 views

Does a CEL always result in an OBDII DTC?

Will any error which causes the check engine light to go on show up as a DTC during a regular OBDII scan? This is obviously only in relation to OBDII compliant vehicles.
2
votes
0answers
13 views

Coolant loss out of overflow of an 1980 c-10

I have an 1980s Chevy 305 engine. Was out for early morning breakfast and noticed coolant was coming out of overflow tank. The motor had not gotten warm yet. What could be causing it to overflow???
5
votes
1answer
42 views

Diesel Yaris doesn't start very well after an alternator change?

I have recently changed the alternator after it died in my diesel Yaris. I have done about 150 miles with the new alternator however it still doesn't start very well. It now takes 1 long or sometimes ...
2
votes
0answers
9 views

Acura MDX rear-seat cup holder not opening

I have an Acura MDX 2008, and I recently noticed that the rear seat cup holder was broken. It won't open up. As I don't have a warranty on the vehicle, how can I fix this issue? Thanks!
8
votes
2answers
530 views

What is the difference between H7 and H7U bulbs?

Scenario I'm changing my left headlight bulb and it says it is a H7U one. What does the U marks? Possible solutions I searched a bit and found two possible solutions: Marks the shape of the bulb. ...
5
votes
2answers
44 views

Car Won't Start After Disconnecting and Reconnecting Ground Cable

I wanted to reset my check engine light to see if a problem I think I fixed resurfaces, so I disconnected my negative lead from the post. When I reconnected the lead the car refused to start. ...
3
votes
0answers
13 views

After market lights

My aftermarket led lights work at first but if I turn them on after a short period of time they don't? if I plug stock third brake light back in they work fine?

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