Automotive Engine Sensors and Engine Tuning

Feel like pulling your hair out every time your cars engine doesn't seem to run right? Some times after you add an aftermarket part to your ride it will require the engine to be tuned. The engine only knows how to read what it is programmed to read and can only do what it is programmed to do with the information it receives. It becomes very important to understand each engine sensor and how it effects how the engine performs. Your goal is to manipulate the engines computer into maximizing performance within the capable parameters of each sensors output. Follow these rules and you are more likely to come out ahead of the competition.

Free Wiring Diagrams

Ever wonder where you could get a free wiring diagram on the internet completely free. Many off us have been in the position where we need one to repair our car for some reason or another. Doesn't matter if its your car window that won't go up or down or the darn car won't start at all.When you have an electrical issue and your ready to put your mechanical skills to work, you need free wiring diagrams to do the job. Take yourself over to FreeAutoMechanic.com and get your wiring diagram sent directly to your email account where you can view and even print out the automotive wiring diagram.

Car Repair Questions

Have an automotive related question that needs an answer right away? Type your question in the box provided and follow the steps. Your questions will be answered A.S.A.P. by professional mechanics that are online right now. That's right, Your automotive questions can be asked and answered 24 hours a day, 7 days a week. There is no need to wait. ASK a Mechanic NOW!!! and your Auto Repair Questions will be answered.

Where can I get a cheap Remote Starter ?

Remote Car Starters are a great addition to any automobile! If you have already purchased your remote car starter, you may want to use the remote starter wiring and installation charts to help make the installation easier on you. If you haven't purchased your remote car starter, we have listed several below that are sure to fit your need from basic to sophisticated. ONLY $49.99


Astra 1000 >> Only $49.99
Two 5-button Code Hopping Long Range Remote With Super Bright Blue LED Built-In Parking-Light Relay Programmable (+/-)Pre-wired Super Bright Blue LED, Sensor, and Valet Switch ConnectorsPlug-in user programmable Coded Override SwitchHorn Or Ignition 3 (Programmable) (-) OutputRemote Door Locking/Unlocking (-) outputs Programmable Aux. Relay outputs (2nd. Ignition, 2nd. Accessory or 2nd. Starter) Selectable Engine Run TimeEnable or Disable Remote Start in Valet Mode Over 50 Programmable Features

at high rpm I lost power and the engine light started flashing.

I have a 03 5.3 ext cab LS with 109k. Today i was on the highway had to punch it to get around traffic, at high rpm I lost power and the engine light started flashing. Later that day I was driving and got on it again same thing happened. Then on my way back it just started missing out like crazy on normal throttle and the engine light was flashing again, at stop lights it was trying to die. I went to a parts store and ran codes, got MAS code and random misfiring code. So in the parking lot I replaced the $80 MAS. Didn't change a thing, cleared the codes and let it run till the light came back on. This time it was only random misfiring code. So I limp it home, then check plugs and wires. They were original and had planned on changing them any way, but now only had plug money. New plugs didn't help. Well I continued to investigate, Noticed a noise that kinda sounded like a diesel engine from the center of the engine, used to only make this noise when it was cold. I sprayed carb cleaner all over the intake looking for leaks. No luck there. Please help! Need my truck for work. PS I recently replaced the door speakers, not a bose system so I don't think this maters but I don't know. Anyway yesterday got in my truck and the radio wasn't working. Could change stations but no other buttons worked and no volume. Later it was back and working fine, but the clock reset. No probs since.

Answer:
It sounds that you have a faulty fuel pump.
I will try to describe what is happening:
Your fuel pump may work and supply some fuel to the fuel injectors, but does not create enough fuel pressure. That means that your engine is starving for fuel .
If the engine does not get enough fuel, it starts missing and a detonation may occur ("a noise that kinda sounded like a diesal engine ").
You should have your fuel system pressure checked. It should be around 55-62 PSI.
PS. I would reinstall the original MAF sensor if the new one is not a GM's part.
A MAF related trouble code could have been a consequence of the throttle plate opening without RPM increase.

How to Change Spark Plugs

With a little bit of know how and a few tools, changing your spark plugs can be one of the most rewarding do it yourself projects an individual can do to their vehicle

I think this video best describes the procedure :

Do 1993 Jaguar radiators have metal or plastic tanks

Original Equipment was metal. Aftermarket can be either.

Some manufacturers reserve the right to change design and construction materials without notice. For example, a radiator listed as copper/brass may be supplied as plastic/aluminum, a radiator listed as 3 row may be supplied as a 2 row, or a radiator for a manual-transmission vehicle may be supplied with oil cooler fittings (which are unnecessary for a manual transmission but allow the same part number to be used for both manual and automatic vehicles). Regardless of design, the manufacturer offers the same warranty and the same assurance that the part will fit the vehicle application listed and perform as well or better than original equipment