Mobile Tek

63 points
Self taught. Changed 1st set of brakes at age of 10. First full engine rebuild (crank to head, re-ring 1970 Datsum 510) at age of 12. I'm not the best, but I try and learn something new everyday.
Recent Activity

Question Answered: All of the windows stopped working. Does that mean it's the switch??
May 06, 2014, 08:33 PM
Don't forget the simplest. Check fuses!
Question Answered: code showing# 6 cylinder misfire
March 25, 2014, 01:32 AM
Yea have a second opinion. Ask them if they did a compression test on it. If compression is within 10% compared to other cylinders chances are its not the head.
Question Answered: does this vehicle have a timimg belt or a chain?
March 16, 2014, 02:01 AM
4.0l or 5.6l both have timing chains. 3 to be exact.1 primary and 2 camshaft chaines. With Nissan"s in particular if oil changes aren't done at proper intervals and wrong viscosity the primary chain tensioner goes bad causing excessive chain slack. Very costly. Depending on shop labor $800-$1000. Parts $300-$400
Question Answered: Where is the gauge connection on the fuel rail?
March 09, 2014, 10:42 PM
On this particular engine you have to disconnect the fuel line feed into the fuel rail. A proper fuel injection pressure tester should have multiple adapters to hook up to different systems. This Chrysler doesn't have a shrader valve.
Question Answered: Why wont my car start?
March 05, 2014, 07:49 PM
You need to check if your Optima has a transponder chip in your key. If fault in system (bad antenna ring) security thinks someone is Trying to (hotwire) car and shuts down computer. Ie no ignition or fuel. Try spraying starting fluid in air box. If car runs no fuel. Make sure when key is turned on you hear fuel pump run for about 2 seconds then stop. If not check fuel pump relay.
Question Answered: Why does my idle up and hesitates ?
March 04, 2014, 07:14 AM
I agree check intake manifold for leak. Let car idle then spray carb cleaner where intake meets cylinder head and around any vacuum hoses if idle changes you found leak.
Question Answered: Any hope of using coolant additive to seal lower manifold leak? How much should
March 04, 2014, 12:28 AM
Usually if lower intake manifold is leaking from water port you'll have either steam coming out of exhaust or intetmix water in oil. And if so an additive won't work. Need to replace gaskets. Factory uses plastic ones with rubber O rings. Designed to fail.
Question Answered: crankshaft pulley bolt is it right hand thread how remove it replacing timing 2
March 04, 2014, 12:18 AM
Air impact is best. If not available use a chain wrench and a long breaker bar. Chain wrench wrapped around pully to stop crankshaft from turning. Remember (lefty loosie, rightly tighty)
Question Answered: Why when I press the clutch does my engine rev without me stepping on the gas?
March 04, 2014, 12:00 AM
If MIL light is on check codes. Possibly a bad IAC valve. Or leaking intake manifold gasket. If no MIL light try disconnecting neg. Terminal for 10 to 20 minutes. Reconnect battery start car let idle for about 5 minutes. Might help.
Question Answered: My brake fluid is leaking, what causes this?
March 03, 2014, 11:10 PM
First, can you visually see the location of where fluid is leaking? Front caliper, brake hose (line), or fluid by rear brake drum (wheel cylinder). Possibly out of master cylinder into brake booster. If no visual leak then fluid is low due to worn pads. Most of fluid is down in brake calipers because pistons are pushed out. When new pads are installed pistons have to be compressed back which will force fluid back into reservoir
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