Question about Volvo S40

1 Answer

Bought a engine had 200lbs compression all cylinders installed it now runs bad

Heard it run and had installed now it runs like ****

Posted by Anonymous on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 18 Answers

Check firing order , if engine has been stood a while valves may be sticking try putting injector cleaner in the in take when engine is running just a small amount put the rest in the tank

Posted on Feb 10, 2015

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

SOURCE: 1998 jaguar vander plas

about 73500k
no the engine was normal not hot, just heard the noise, and after that it has kept on having that noise when l start.

Posted on Jul 10, 2008

bunnydawg
  • 5158 Answers

SOURCE: low compression in #1and #2 cylinders 1993 eclipse gs 1.8l

burned valve is likely the culprit.... or bad rings.... hook air up to that cyclinder one at a time.... and listen where the air is escaping... be aware that the motor will rotate till the piston is at the bottom of it's rotation. if it's a burned valve you will have to remove the head and replace it but somewhat easier job then replacing the rings. darn almost forgot.... it can also be a blown head gasket.... same procedure but you might need a brush and some soap water to test for an air leak at the side of the head. when you are done spray some wd 40 on it to get the water off so the spark plugs do not arc.


Robert

Posted on Sep 26, 2008

STEVIE_N_24
  • 147 Answers

SOURCE: 1999 dodge durango v-8 magnum oil has caked up inside motor

Common problem with these engines. Probably has a slight coolant leak at a head gasket causing this problem. Recommend to install reman engine you will save time and money compared to overhauling existing.

Posted on Mar 29, 2009

  • 172 Answers

SOURCE: engine idles rough throughout rpm range.

What tests were run to let you know you only had power on 1 and 2?

Posted on Jan 09, 2010

duane_wong
  • 6826 Answers

SOURCE: hyundai accent 2001 -my car is

Yes, I think that the valve is either broken, or the rings are worn out on the cylinder. More likely a bent or broken valve or stuck valve in the open or closed position.

I would use a compression tester, though, to test how much pressure builds up in each cylinder and to see if it is balanced across the remaining cyilinders.

Posted on Oct 02, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I swap my engine on my 03 ranger 3.0 flex fuel,with one from a 02 ranger gas fuel. It was running rough until I put my old fuel rail and injectors.But I still have a miss on cylinder #3 already install new...


Check compression in number three. You could have bought a bad engine. And yes. You need to change every sensor. If they don't match with the plugs. replace the engine. There is a reason for different engine codes. You should have stuck with them.

Jul 25, 2015 | Cars & Trucks

2 Answers

Compression


The head on the motor you bought is bad; or the head gasket is leaking; or the rings in the 2 center pistons are bad. 30 lbs is far too low of a compression, and 5 lbs is garbage. They should be closer to 80 or 90 psi and not have more that 5% variance between the cylinders.
The first thing you will have to do is pull the head off and check it. Or you can take it back to the salvage yard you got it from, show them the results from the compression test and either get another motor, or have them refund your money.

Mar 08, 2015 | 2006 Chevrolet Malibu

1 Answer

04 DODGE Ram hemi cylinder 3 misfire


Check engine compression and compare. then test running engine compression most engines have about 130-170 cranking compression and about 90-110 running compression. OR bring that cylinder to its Top Dead Center compression stroke apply air to the cylinder and check to see where the air is going open throttle plate bad intake valve, from exhaust pipe bad exhaust valve, from oil cap piston rings.

Mar 23, 2014 | 2004 Dodge Ram 1500

1 Answer

Low compression on cylinder 1 bad skip if you idle it up the skip will go away and also it runs fine while driving


If there is low compression in one cylinder the fault wil be shown more at IDLING as the engine will not be smooth. So there will be reduced power and it might also skip.
In th long run you will have reduced power of the engine even as the engine will not show on higher RPM and thus the fuel useage will be more.
It will be good to check out and estimate to get the compression corrected to all cylinders.

Sep 03, 2011 | 2005 Chevrolet Colorado

2 Answers

Check engine light is on, they say multiple miss fire in cylcinder 6. but no one can find the problem van runs great


first do a cylinder compression test on engine to verify good engine compression this should be around 110psi to 175 psi check for vacuum leak, intake port for #6 cylindermay be leaking air, or also check coil for that cylinder, if wire and spark plug have already been changed, last replace fuel injector for that cylinder.

Jan 24, 2011 | 1996 Dodge Caravan

1 Answer

I just bought a 1999 eclipse rs...its does not run...my buddy who owned it before me ran it hard. Are there common problems with the 420a engine that would cause the engine to stop working? Are there...


I would do a cylinder compression test, that will tell the story, if bad compression in any cylinder's, head will have to come off to repaired, more then likely engine ran hot. If your going to fix it, also replace timing belt and water pump while in there.

Aug 03, 2010 | 1999 Mitsubishi Eclipse

2 Answers

How do you check compression


A compression test will tell you if your engine has good compression. An engine is essentially a self-powered air pump, so it needs good compression to run efficiently, cleanly and to start easily.

As a rule, most engines should have 140 to 160 lbs. Of cranking compression with no more than 10% difference between any of the cylinders.

Low compression in one cylinder usually indicates a bad exhaust valve. Low compression in two adjacent cylinders typically means you have a bad head gasket. Low compression in all cylinders would tell you the rings and cylinders are worn and the engine needs to be overhauled.

HOW TO CHECK COMPRESSION
Compression can be checked two ways: manually with a compression gauge, or electronically with an engine analyzer the measures cranking compression. With electronic testing, a computer analyzer estimates compression in each of the engine's cylinders by measuring slight variations in engine cranking speed.

The results correlate well with actual gauge readings, and can be completed in a matter of minutes without having to remove any spark plugs. What's more, the analyzer prints out the results of the compression test making it easy to see and compare the actual numbers.

To check compression manually with a gauge, all the spark plugs must be removed. The ignition coil must then disabled or the high tension lead grounded. If the engine has a distributorless ignition, the ignition coils must be disabled to prevent them from firing. The throttle must also be held open.

The engine is then cranked for a few seconds using a remote starter switch or a helper while a compression gauge is held in a spark plug hole.

The maximum compression reading is noted, then the process is repeated for each of the remaining cylinders.

The individual cylinder readings are then compared to see if the results are within specifications (always refer to a manual for the exact compression figures for your engine because they do vary from the ballpark figures quoted earlier).

IS IT THE RINGS OR THE VALVES?
If compression is low in one or more cylinders, you can isolate the problem to the valves or rings by squirting a little 30 weight motor oil into the cylinder through the spark plug hole and repeating the compression test. The oil temporarily seals the rings.

If the compression readings are higher the second time around, it means the rings and/or cylinder is worn. No change in the compression readings would tell you the cylinder has a bad valve.

Hope this help (remember comment and rated this).

Apr 20, 2010 | 1998 Ford Contour

1 Answer

Honda 98 civic...check engine light came on P0304? how do i fix this car is running but it idles low and seems want to die down on me if driving it slow but on freeway it runs okey...my mechanic told me...


A P0304 code means that the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #4.

A code P0304 may mean that one or more of the following has happened:

Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Mar 10, 2010 | 1998 Honda Civic

2 Answers

Have a 2003 Taurus, 3.0 engine that has a misfire on #2 cylinder. Replaced all spark plugs, wires, coil, replaced the fuel injectors, crank sensor, cam sensor, still have a misfire on #2 cylinder. It has...


What the miss there before you started replacing parts or did you replace some of them as maintenance items. Like the plugs. Possible that the parts store gave you one with a crack in it??? Also how about a vacuum leak at the intake gasket. You said you have compression. Have you tried checking running compression. A broken valve spring can cause good cranking compression, but cause no compression when it's running.

Aug 16, 2009 | 2003 Ford Taurus

1 Answer

Not firing right on no.4


First check plug and make sure the right plug for this vehicle,make sure that the heat rating for this plug is correct. Your problem could be a wrong heat rating plug been installed. Also make sure that the misfire is due to a bad plug and NOT a bad injector or injector wiring or uneven compression or even bad coil. Check injector wiring and make sure it not shorting or broken. To check injector pulse use a NOID light can be bought at almost any auto parts store like Auto-zone etc. Also compression can be checked with compression guage. A rule of thumb to go by is if any cylinder has more than 10 PSI in difference in compression there is a problem like a burnt valv etc. Here is a n example cyl# 1 170psi cyl#2 176 psi cyl#172psi cyl# 4 150 psi, there is a problem with cylinder # 4 and will cause a miss from cylinder #4. Good luck and thank for using FIX YA

Mar 26, 2009 | 2000 Mercury Grand Marquis

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

21 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volvo Experts

yadayada
yadayada

Level 3 Expert

75817 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8180 Answers

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

Answer questions

Manuals & User Guides

Loading...