Question about 2000 Lexus RX 300

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I have a 2001 Lexus rx 300 with a check engine light on with code P0301 cylinder 1 misfire. The spark plugs and ignition coils were already replaced. I swapped fuel injectors with known good cylinder and still have same code. Compression check was done and found cylinder 1 to be a bit low. Had the cylinder head sent to machine shop and came back tested fine. Tested electrical signals to fuel injector and got good pulsewidth signal. Checked for spark and got good spark. Don't know what else to do... Help!!

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  • Lexus Master
  • 874 Answers

The minimum compression required is 95 psi, below this there is no good combustion, incusive the spark plug gets wet in gasoline
If this condition exists, you should check the piston rings and cylinder surface

Posted on May 23, 2017

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6ya6ya
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Posted on Jan 02, 2017

mx5turbo92
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SOURCE: What is the cost of a 90000 mile service for a lexus RX 300?

$700

timing belt
idler pulley
water pump
timing belt tensioner
valve cam gasket
coolant flush
spark plug
oil change
pcv valve
tranny oil change
differential fluid cahnge
drive belt
upper/lower radiator hose
brake system flush
air filter

good luck,i hope this help pls dont forget to rate me thanks

Posted on Jun 05, 2009

roniecon
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SOURCE: 1999 RX 300 Lexus Blower Motor

blower motor bearings going out ,,,replace motor

Posted on Jul 04, 2009

  • 81 Answers

SOURCE: HEATER NOT WORKING IN 2001 LEXUS RX 300

you most likely have a bad airmix servo. this happens alot on these. they are expensive to replace too.

Posted on Oct 04, 2009

roniecon
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SOURCE: 2003 kia # 3 misfire/ runs rough

Replace the coil for number 3 cylinder.

Posted on Nov 11, 2009

csmock132
  • 4669 Answers

SOURCE: 1999 Grand Am 3400 v6 misfire.

I was asking about the pushrods because I had this problem with one of these engines that had a bent push-rod. I robbed a push-rod out of an older 3100 and it was just a fraction of an inch longer which bottomed out the lifter. I figured it out by removing the valve cover and loosing the rockers when it was running and it smoothed out. I'm guessing you checked for vacuum leaks already. How about injection pulse on the number 6 cylinder when running. Another thing you could check is running compression. You said you checked compression but did you just check cranking compression or did you check running compression too.

Posted on Apr 09, 2010

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Honda odessey engine code p3100


There is no p3100 code!!

I think you copied this wrong. the code is p0301, which is a common one.

The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 1. If the problem persist more tests needs to be done to diagnose problem.

Possible causes
- Faulty spark plug 1
- Clogged or faulty fuel injector 1
- Faulty ignition coil 1
- Fuel injector 1 harness is open or shorted
- Fuel injector 1 circuit poor electrical connection
- Ignition coil 1 harness is open or shorted
- Ignition coil 1 circuit poor electrical connection
- Insufficient cylinder 1 compression
- Incorrect fuel pressure
- Intake air leak

Most likely cause:
Faulty spark plug 1 or Faulty ignition coil 1 (Ignitor coil)

Either are easy fixes. Start with a new spark plug. If the problem continues replace the coil. Pic below. new about $30-$40.





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Apr 27, 2015 | 2005 Honda Odyssey

2 Answers

Getting trouble code p0301


Code 301 means cylinder one is not producing power.
Problem could be ignition, fuel, or mechanical.
If compression is good on all cylinders, check the fuel injector.

Mar 08, 2015 | 2001 Ford Explorer

1 Answer

Engine shaking while accelerating


check engine light on, code P0300 P0301 P0302 P0303 P0304 THIS ARE ALL MISFIRES, 300 is random, 301 cylinder one 302 cylinder 2 and so on, the evaluation is once apart check the spark plugs condition, if they look ok, replace coils and plugs. if the light is not on, verify it works by turning the ignition to pos 2, if not replace light, if yes, and this here are not the codes, read the codes and re send it, posible bad cylinders, or poor injector.

Nov 09, 2013 | Renault Cars & Trucks

3 Answers

CODES-PO301-PO303-PO316- CHANGED PLUGS & WIRES. STILL MISS ON START UP, GOES AWAY MOST OF THE TIME ABOVE 1000 R.P.M


P0301 - Cylinder 1 Misfire Detected.

Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak

Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

P0303 - Cylinder 3 Misfire Detected.
Follow info from P0301.

P0316 - Misfire Occurred In The First 1,000 Engine Revolutions.

Causes:
- Damaged CKP sensor.
- Ignition System.
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Base engine
- Damaged Powertrain Control Module

Solutions:
Usually the P0316 is combine with a P03XX codes. The P03XX code indicates in which cylinder the misfire occurred.

Jan 17, 2011 | 2002 Mercury Sable

1 Answer

Giving a 300 and a 301 code where do i start sounds fine when started and then when you put in gear it start misfiring


P0300 - Random / Multiple Cylinder Misfire Detected

Possible Causes:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plugs
- Replaced Injectors
- Replaced Ignition Coils

P0301- Cylinder Number 1 Misfire Detected

Possible Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak at cylinder

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

Most likely your issue is with cylinder number 1. Follow the info I have provided and you should be able to solve this issue.

Jan 14, 2011 | 2002 Toyota Tacoma

1 Answer

Check engine light on got Code P0301


HELLO: This code means misfire on cylinder #1, Check spark plug, Coil, ignition module and injector. Maybe this will help.

Oct 31, 2010 | 2001 Oldsmobile Aurora

1 Answer

2003 mercedes Benz C240 codes P0300, P0301, P0302 and P0303. Please, help me how to fix?.


P0300 Random Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
according to this fault codes first mark ignition coils
3 ---------------- 6
2 ---------------- 5
1 ---------------- 4
RB-------------LB
this right banks and left bank, please remove Ignition coils with lids and spark plugs from right bank and swap with left bank, if fault code change as
P 0304 Cylinder 4 Misfire Detected
P 0305 Cylinder 5 Misfire Detected
P 0306 Cylinder 6 Misfire Detected
You can Identify it's a faulty ignition system then next swap ignition lids from ignition coils be careful each coils have two lids one short and other long bit deference and when you remove and fix it to the car keep in mind correct order because each coil two different fire for two spark plugs don't mix up, if you mix it can create the fault code.if you detect any fault ignition coils or spark plugs or lids replace that and also whether god or bad recommend to replace spark plugs, find the right that's most important thing, if this way couldn't found the any ignition fault next step is check fuel presser, when the engine running fuel presser must be around 4.5 bar without engine running must be 4 to 6 bar if the fuel presser too low need to check two different things one is fuel pump other is fuel injectors, in this case you can swap injectors from right bank to left bank and find is the injectors leaking, if not leaking faulty fuel pump.is this information helped you? if yes please leave a comment,

Oct 15, 2010 | 2007 Mercedes-Benz C230 Sedan

2 Answers

Code p0301 and p0316


P0301 - Cylinder 1 Misfire Detected
P0316* - Engine misfire detected on Startup (First 1000 Revolutions) Could be a Bad Coil or bad spark plug or a bad wire on cylinder one. Check the plug and the wire first then move to the coil. Good Luck.

Sep 23, 2010 | 2002 Ford Explorer Sport Trac

1 Answer

Lexus 2002 RX300 - What is it when the Trac Off, VSC & Check Engine lights are on and the DTC code says cylynder 1 and 6 misfire


You could have a bad coil pack or a bad fuel injector. swap out the coil packs from the misfiring cylinders and put them in the cylinders that are known to be firing correctly to narrow it down to determine if it is the coil pack first. When is the last time you changed the spark plugs? Pull them out of the misfiring cylinders to check the condition of the plugs.

May 25, 2010 | 2002 Lexus RX 300

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