Question about 2002 Cadillac Escalade

1 Answer

Po 307 misfire on #7

I have a 2002 escalade. I ahve a po307 misfire. I was told it was fuel pump. Replace fuel pump, replaced plugs and wires. Plug is always dark and wet. I switched coils and problem stayed with number 7. I also listened to injector with stethescope and hear if clicking. I also tested wiring harness to injector. I ohmed injector s and coils and they are fine. I am running mout of options. help!

Posted by on

  • 2 more comments 
  • pumpguy05 May 29, 2009

    I put a stethescope on all the injectors and I hear them all click could it still be bad?

  • pumpguy05 May 29, 2009

    Ok I will pull injector off today and see if it is plugged to be stuck open

  • pumpguy05 Jun 01, 2009

    I pulled off the fuel rail and the injector in question. Sure enough it was plugged with sand. It took a 3 dollar can of gumout to clean it out and works fine now. Thanks

  • Anonymous Mar 23, 2014

    misfire replaced plugs injectors coil pac fuel filter has 61 psi fuel pressure

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 105 Answers

Just because injector test ok electricly that doesnt mean its working right if the tip is plugged instead of sprayying a fine ignitable mist of gas it just drips out if this happens the gas wont ignite and you get a wet plug. you can switch injectors from one cylinder to anther or you can just replace #7 let me know how you make out with this

Posted on May 29, 2009

  • smartwrench1 May 29, 2009

    just because the injector is clicking doesn't mean the tip is not pluged the only way to check for this is to remove it from the truck and visualy inspect it as the dealers dont even have a way to test for spray pattern please keep me posted

  • smartwrench1 Jun 01, 2009

    if you could please flag this problem as fixed i would appreatate the good word thanks

×

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

3 Answers

I have a 97 Dodge Ram 1500 with a 5/9 in it I put plug wires on it and now it's popping and it lost power and it had a code po302 and Po 307


The P0302 code means that the cylinder 2 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 2. If the problem persist more tests needs to be done. PO307 is the same thing except number 7 cylinder. Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation

Nov 29, 2015 | Dodge Cars & Trucks

1 Answer

What does po 305 cylinder 4 misfire mean? Po 316 misfire on startup? po 300 random misfire? Po 305 Cylinder 5 misfire?


Hi Micaela:
I'd be looking for ignition problems like shorting out spark plug leads or a bad distributor cap. Try running it in a really dark place and see if you can see sparks around the plug wires.

May 13, 2015 | 2004 Ford Explorer Sport Trac

1 Answer

Po302 po304 po307 po171 codes are showing up, any ideas?


PO 301 thru PO 308 are engine cylinders with possible
misfires & bad coils

PO 171 is a lean condition on Bank# 1 oxygen sensor

If the front or upstream sensor are over 100,000 miles, change
them as preventative maintenance

The cylinder misfires have to be diagnosed & tested any of
several ways,professionally for the most part

Jan 15, 2013 | 1999 Lincoln Town Car

2 Answers

I have 2006 Isuzu I-280 my problem is the engine light came on got the code PO 300 I put new spark plugs I ease the code the light did not came on for awhile now is on again


P0300 = Random/multiple misfires detected.

Something else besides worn spark plugs is causing the misfires. Check for a clogged fuel filter, low fuel pump pressure, fuel pressure regulator stuck in idle (low) mode, leaky spark plug wires, vacuum leaks, and a leaky EGR valve.

Feb 27, 2011 | 2006 Isuzu i-280

1 Answer

I have a po 300 engine code random cylinder misfire i change cap rotor and wires problem still exists


PO300 - Random/Multiple Cylinder Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS) signal to vary, Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

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

Solutions:
- Perform Injector Service
- Replace Spark Plugs
- Replace Injectors
- Replace Ignition Coils

Jan 27, 2011 | Chevrolet Silverado 1500 Cars & Trucks

2 Answers

PO307 check engine code. i have changed spark plugs, ignition coil and ignition wires. Still cant figure out problem


Causes: A code P0307 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

Possible Solutions: 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.

Hope this helps (remember to rate this answer).

Oct 28, 2010 | 2003 Cadillac Escalade Esv

1 Answer

Engine code po307 AND PO410


Hey; Code 307 is a code for misfire on cylinder #7. It could be caused by bad spark plug, ignition module. If engine has a miss then I would replace the spark plug first. If that don't fix then it will require further diagnosis with a scan tool. Code PO410 is for the secondary air injection system. Make sure the vacuum hoses going to the valves on the front and rear cylinder banks are connected and the hose(s) not damaged. Also make sure the solenoid is connected both electrical and vaccum' Maybe this will help

Aug 30, 2010 | 2001 Cadillac DeVille

1 Answer

Code po 455 and code po 307


P0455: EVAP- no purge flow or large leak. Check for leaks in the evaporative purge system.
P0307: #7 cylinder misfire. Check spark plug and wire.

Aug 23, 2010 | 2000 Ford Explorer

1 Answer

1997 E-420


Hello, Check/replace distributor caps and rotors. They will cause this problem.
If you find this information to be correct would you please enter a "fixya" rating.
Thanks, Gator241

Jan 24, 2009 | 1997 Mercedes-Benz E-Class

Not finding what you are looking for?
2002 Cadillac Escalade Logo

474 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8152 Answers

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

Answer questions

Manuals & User Guides

Loading...