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L6-4.0L

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Check gauge light coming on
Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter,...
Question
Jeep starts fine but then won’t move. Only rev. Only happens when it sits overnight. I have a Jeep Wrangler, 112000 miles
Hi Meagan. Thanks for contacting us today. Usually when you can shift into reverse, but the car will not go forward in drive, then it's caused by a damaged shift solenoid or internal transmission problems. An obstruction of debris inside...
Question
I have a 1999 jeep Cherokee XJ that idles fine but when I accelerate it spits and shutters. Any ideas?
Check engine compression and intake vacuum to first rule out possible mechanical problems such as stuck or leaking valves. Among the causes of poor acceleration are clogged fuel injectors and/or inadequate fuel pressure/volume. When an injector is clogged it can...
Question
I have a very loud knocking sound from the front driver side of my 1991 Jeep Cherokee Laredo 4x4
Hi Taylor. Thanks for contacting us tonight. A loud knocking sound coming from your front wheels can be caused by wheel bearings or inner transaxle components. If the noise does not come on during reverse, then it's likely a forward...
Question
My car is very loud when accelerating and smokes when running, stops immediately when the car turns off.
The problem sounds like you have an exhaust problem. You may have a broken pipe or bad convertor and is rattling in the exhaust. Have a mechanic like one from YourMechanic inspect and diagnose the problem for you.
Question
I have a 2001 Jeep Wrangler that recently has started making a clunk and clicking noise from stand still and during left turns.
Hi Luciano. Thanks for contacting us tonight. It's quite possible that you have a few different issues causing these noises. In regards to the clunking noise from the center while first starting to roll in first gear, it could be...
Question
My 2004 jeep cherokee turns off while driving
During one of the no start incidents, you can check for ignition and fuel pressure (including injector operation). Electrical components will sometimes cut out as heat builds (coils, for instance). But, if you test the appropriate components during the period...
Question
My 1990 toyota landcruiser turbo diese 1HDT has a top speed of 180 km/hr but it max out at 140km/hr. How can I fix this issue?
Hi Henry. Thanks for contacting us today. Although a vehicle might have a "top speed" (on the speedometer) - most vehicles are limited for safety or government regulations. A Land Cruiser should NEVER accelerate past 80 MPH as they are...
Question
Rough idle after fuel injector swap
Hi Mason. Thanks for sending your question today. Most of the time, when this occurs, it's due to either the replacement injector not being correctly installed or perhaps a secondary or other injector was faulty as well - but not...
Question
1996 Jeep Cherokee cranking but no spark
Hi Charlie. Thanks for sending in your question today. In cases where multiple parts have been replaced, more often than not, the starting problem is due to something incredibly small but vital - such as a loose ground wire or...
Question
Random low then high idle jumps
This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear, making turns (which makes use of the power steering pressure switch) turning on...
Question
My 2000 Jeep Grand Cherokee was driving okay but now when I go to press the gas pedal it does not accelerate
What you are describing sounds like you may have a clogged or damaged catalytic converter. The catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When the catalytic converter is...
Question
2005 jeep wrangler won't start. stops cranking mid start
You may have a defective starter but will need to monitor the start signal on starter to see if it stays on while the start signal is on. If losing start signal to starter then you may have a bad...
Question
check engine light with oil leak
Hi John. Thanks for contacting us today. Oil in front of the motor, near the crankshaft pulley, is often from the front crankshaft seal. Although this is not normal, it is common with an engine 20 years old. I'm not...
Question
I have a Jeep Wrangler tj that fuel pump works relay works there is power all the way back into the harness but will not turn on.
Hi Davian. Thanks for contacting us today. When this occurs, it usually is caused by two things. First, there may be an exposed wire (a ground in most cases) that is shorted or not attached correctly, or the pump itself...
Question
When I turn my car on it acts as if I am flooring the accelerator
It sounds like your throttle body is sticking. You might be able to physically un-jam it but there is likely something in the system that needs replacing. I recommend you don't try starting the car anymore until you have it...
Question
Car barely moves or takes a few minutes to get moving when first start?
A clogged fluid filter or failed oil pump can cause no movement in any gear. Other potential causes are a broken input shaft, broken drive chain or sprockets, broken output shaft, broken oil pump shaft, stripped torque converter splines, broken...
Question
Car won't start up after changing injectors
Hi there. Thanks for contacting us tonight about your Jeep Grand Cherokee's starting problems. In most cases, sticking with the OEM replacement parts will produce the best results. This is especially true in regards to fuel pumps and fuel injectors....
Question
Jeep starts but won't move
Hi Connor. Thanks for contacting us today. In most cases when this occurs, it's due to a shift linkage or shift solenoid failure. It's also possible that you have damage to seals or gaskets inside the transmission case. The best...

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