My 1995 Lexus LS400 has 120-130 psi compression in all 8 cylinders, does anyone KNOW what factory specifications are?

1 Answer

Claude Kayser

Lexus Master 9,098 Answers
Posted on Aug 01, 2015

Claude Kayser

Lexus Master

Joined: Jun 15, 2015

Answers

9098

Questions

Helped

5066894

Points

28436

1995 Lexus LS400 specifications, information, data, photos ...

www.carfolio.com/specifications/models/car/?car=23507
1995 Lexus LS400 automobile specifications & information. ... The Lexus LS400's engine is a naturally aspirated petrol, 4 litre, double overhead ... 4 valves per cylinder... bmep (brake mean effective pressure), 1171.5 kPa (169.9 psi ).

1 more comment
Anonymous Aug 01, 2015

I'm a girl...I need a little more info, LOL. So you're saying that the compression test should read 170psi in each valve? What if it doesn't? 30-40psi less in all 8 seems coincidental?
Anonymous Aug 01, 2015

Excuse me...in each cylinder! SORRY...remember, I'm a girl and trying to tinker in a man's domain...It's s really cheap tester from Harbor freight, maybe it isn't working well either...I dunno
Anonymous Aug 01, 2015

The definition of BMEP is: the average (mean) pressure which, if imposed on the pistons uniformly from the top to the bottom of each power stroke, would produce the measured (brake) power output.
Please note that BMEP is purely theoretical and has NOTHING to do with ACTUAL CYLINDER PRESSURES. It is simply a tool to evaluate the efficiency of a given engine at producing torque from a given displacement.

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

1helpful

1answer

Mechanic said compression test on rebuilt 350 engine with only 49 miles on it is only 120 Psi across all cylinders but engine runs great. Isn't it too low compression?

Compression ratio in these engines is 8:1. So, 15psi x 8 = 120psi. So, yes its correct to have 120 psi.

Read full answer

Sep 15, 2019 • Cars & Trucks

0helpful

2answers

3.8l. How much compression should it have?

most standard engines run a compression of around 155 -165 psi with no more than 10% variation between cylinders

Read full answer

Mar 12, 2016 • 1995 Buick Park Avenue

1helpful

2answers

I need the cylinder compression for a 2000 2.2 liter toyots solara

Generally speaking the number you need is the average of all cylinders, then no more than + or - 10%.
I would say if you have 100psi in all cylinders you are ok as long as none of the cylinders are more than 10 or 20 psi off from that.

Read full answer

Apr 10, 2013 • 2000 Toyota Camry Solara

0helpful

1answer

1995 yamaha vmax 600 backfires wont start

if it is backfirering sound like timing is out of spects

Read full answer

Feb 16, 2013 • Cars & Trucks

1helpful

1answer

What is the factory specified max. compression, new motor, GM 4.3 ltr, V6

Interpreting the Results
of the Engine Compression Test.The idea behind the Engine Compression Test (in the case of a Misfire Condition or Rough Idle Condition) is to find out if any one engine cylinder is not contributing 100% of its power to the overall engine output. If only one cylinder has lower than normal compression, your GM 4.3L (or 5.0L, 5.7L) equipped vehicle will run rough or cause a Misfire Code to set and turn on the Check Engine Light.
So then, to wrap things up, the individual cylinder compression readings of each engine cylinder can not vary more than 15%... and this is how you can find out:

1Grab a calculator and multiply the highest compression reading that you recorded by .15.

So, let's say that cylinder #4 gave you the highest reading of 170 PSI. Well 170 X .15 gives you 26 (25.5 rounded off).
2Now, the next step is to subtract 26 from 170... which gives us 144 PSI.
3So then, 144 PSI is the lowest possible compression reading that any one of the rest of the engine cylinders can have. Any compression reading below this.. and that engine cylinder will misfire..

Read full answer

Sep 30, 2012 • 2006 Chevrolet Silverado 1500 2WD

0helpful

1answer

1995 toyota will die and will not start until engine is cold

Your problem sounds like either your fuel pump is cutting out when hot,,or the condencer or coil or you are losing compression due to piston rings worn or broken.
So first get a compression test if all cylinders are around 110 cold then check again when hot they should be up by 20 psi even if 1 or 2 cylinders are down to 80 it could be valve problem so get a WET and DRY test done, but once you have ruled out the compression and its ok then you need to look further.

Let me know how you go. RON

Read full answer

Jan 09, 2011 • 1995 Toyota Camry

1helpful

2answers

I need to know what the stock compression pressure in psi should be on a 1991 mercury grand marquis 302 5.0L, I dont want the ratio, I need the psi. What was it from factory?

This engine offered a 4-inch bore, 3-inch stroke and a compression ratio of 8.9 to 1.

each cylinder should have the plugs removed, and each cylinder should have atleast 150 psi, with no more than a 10% difference between the 8 cyl .

most engines period will cary atleast 90 to 180 psi depending on the number of cyl.

Read full answer

Jan 07, 2011 • 1991 Mercury Grand Marquis

0helpful

1answer

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...

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

Read full answer

May 20, 2017 • 2000 Lexus RX 300

0helpful

3answers

What is the cylinder compression psi fpr the 2.0 liter engine

usual on 4 cylinder around 175psi.225psi is very high for your car,150psi seems ok,you may have two problems.A leaking head gasket and high compression due to carbon build up on the pistons.Check your Hyundai Dealer to see is this problem is covered under their 100,000 mile warranty,it should be.IF not then
the head needs to come off and had gasket replaced along with clean the top of pistons since they are right there,sounds like and easy fix.also check condition of radiator,and I would rec. replacing thermostat since some Hyundai models had problems with their thermostats

Read full answer

Jun 14, 2009 • 2001 Hyundai Elantra

5helpful

1answer

Mazda b2200 compression specs

those are average numbers and they are a little on the low but that is typical considering the age of the vehicle the compression should be 115 -120 psi.. hope this helps please rate this...thanks

Read full answer

Sep 24, 2008 • 1988 Mazda B2200

Not finding what you are looking for?

View Most Popular

Cars & Trucks

Mechanic said compression test on rebuilt 350 engine with only 49 miles on it is only 120 Psi across all cylinders but engine runs great. Isn't it too low compression?

Cars & Trucks

585 views

Ask a Question

Usually answered in minutes!

Related Topics:

My 1995 Lexus LS400 has 120-130 psi compression in all 8 cylinders, does anyone KNOW what factory specifications are?

1 Answer

Claude Kayser

1995 Lexus LS400 specifications, information, data, photos ...

Add Your Answer

Attachments: Added items

Related Questions:

Mechanic said compression test on rebuilt 350 engine with only 49 miles on it is only 120 Psi across all cylinders but engine runs great. Isn't it too low compression?

3.8l. How much compression should it have?

I need the cylinder compression for a 2000 2.2 liter toyots solara

1995 yamaha vmax 600 backfires wont start

What is the factory specified max. compression, new motor, GM 4.3 ltr, V6

1995 toyota will die and will not start until engine is cold

I need to know what the stock compression pressure in psi should be on a 1991 mercury grand marquis 302 5.0L, I dont want the ratio, I need the psi. What was it from factory?

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...

What is the cylinder compression psi fpr the 2.0 liter engine

Mazda b2200 compression specs

Not finding what you are looking for?

Cars & Trucks

Mechanic said compression test on rebuilt 350 engine with only 49 miles on it is only 120 Psi across all cylinders but engine runs great. Isn't it too low compression?

Ask a Question

Check Out the Latest Top Trucks Report!

Top Lexus Experts

ROBERT GARCIA

ZJ Limited

Brad Brown

Are you a Lexus Expert? Answer questions, earn points and help others

Manuals & User Guides

1998-lexus-gs300-repair-manual.pdf....

Http://toyota50th.com/ls.pdf. 2007 LS...

Http://partner.aaa.biz/portal/binary/c...

Related Topics:

My 1995 Lexus LS400 has 120-130 psi compression in all 8 cylinders, does anyone KNOW what factory specifications are?

1 Answer

Claude Kayser

1995 Lexus LS400 specifications, information, data, photos ...

Add Your Answer

Attachments: Added items

Related Questions:

Mechanic said compression test on rebuilt 350 engine with only 49 miles on it is only 120 Psi across all cylinders but engine runs great. Isn't it too low compression?

3.8l. How much compression should it have?

I need the cylinder compression for a 2000 2.2 liter toyots solara

1995 yamaha vmax 600 backfires wont start

What is the factory specified max. compression, new motor, GM 4.3 ltr, V6

1995 toyota will die and will not start until engine is cold

I need to know what the stock compression pressure in psi should be on a 1991 mercury grand marquis 302 5.0L, I dont want the ratio, I need the psi. What was it from factory?

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...

What is the cylinder compression psi fpr the 2.0 liter engine

Mazda b2200 compression specs

Not finding what you are looking for?

Cars & Trucks

Mechanic said compression test on rebuilt 350 engine with only 49 miles on it is only 120 Psi across all cylinders but engine runs great. Isn't it too low compression?

Ask a Question

Popular Questions

What does AFS of mean????

'AFS off' light on dash what does it mean and how do

98 lexus gs300 codes p1120 p1121

Lexus RX350 Reset Maintenance required light

RX 330 - Replace tail light on 2004 Lexus RX330

Check Out the Latest Top Trucks Report!

Top Lexus Experts

ROBERT GARCIA

ZJ Limited

Brad Brown

Are you a Lexus Expert? Answer questions, earn points and help others

Manuals & User Guides

1998-lexus-gs300-repair-manual.pdf....

Http://toyota50th.com/ls.pdf. 2007 LS...

Http://partner.aaa.biz/portal/binary/c...