Question about 1997 Ford Econoline

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H circuit does any one know what it is

I have a 97 with a 5.4 eng. I have a bad misfire the computer scan says the problem is in the h circuit can anyone tell me where that is when i ask a mec. they will not tell me just kind of bet around the question.

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  • Rabindra Robinson May 11, 2010

    do you have a trouble code to go along with this all vehicle when put on a scanner gives a numerical code which will be helpful to me to assist you in thsi issue

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They are known for bad coils is there a miss fire code

Posted on Jan 25, 2009

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Car sputtering badly. Codes P303 n P102 show on diagnostics and have replaced both parts associated with these codes,PLUS, new fuel filter, engine still sputtering badly.


Hi,

I hope I can help with this. This could mean the engine spark plugs or plug is the issue. Also check the exhaust pipe. White smoke indicates a coolant issue. Check your coolant reservoir. Black smoke indicates a Fuel issue. Blue is an oil issue. Also, speaking of your spark plugs there very well could be a misfire.

the code P303 could be cylinder 3 misfire
P102 the mass air flow sensor which is on the air filter cover. It's an electrical part and is sensor. Please check these and let me know.

Jul 28, 2016 | Cars & Trucks

1 Answer

No power at high rpm


I'm guessing but this sounds like air problems. do you have a new air filter? The O2 sensor may be off but not technically bad yet. I'm pretty much stuck on something restricting the air flow.

Jan 17, 2015 | 2000 GMC Jimmy

1 Answer

Miss firing


USA car?
engine runs bad, gross misfiring, and stalls and idle speed all wrong>?
and of course all engines smell of unburned fuel when misfiring..so..
and gross loss of power. from engines. sure that is misfire too.
so lets work MISFIRE
fist what engine is this, sure the HONDA mistake,
its really an Isuzu engine. (abomination car) with USA axles. wow.
2.6L 120 hp (89 kW) I4
3.2L 175 hp (130 kW) V6

which engine, we cant fix engines blind. so...
so i drop to generic answsers...... no eng.
1: ever do the 60,000 mile tuneup,?? if not ?,FAIL she will..
2: are all 4 or 6 spark plugs all firing?into fresh spark plugs>?
3: is compression at or or better than 150PSI? on all cyl.
4: is it flooding?
5: is the check engine light on key on then goes out running?
if the CEL hangs up glowing running then scan the ECU.
scan it and get the DTC error codes.
use any scan tool , (OBD2) plugged into the 16pin DLC connector
near knees.
scan it and find what errors you have, i bet, P030x codes.
those are misfire, x = cylinder that is bad. 0= all.

there is a start.
fuel filter fresh. ? (if found easy near gas tank)




Feb 17, 2014 | 1996 Honda Passport

1 Answer

97 blazer is missing from take off at 1000rpm to 2000 then clears out code reader says o2 sencor and multable engine missfire


For the misfires, start by pulling your plugs. They either need to be cleaned or replaced if questionable. Then, you may have a bad coil or coil pack. You can test them with a multi-tester-you'll want resistance values that are specific for your vehicle. Alternatively, you can switch the coil packs around (if you know you have a good one from knowing which cylinders are misfiring and which are firing o.k.) If your misfires change cylinder numbers from swapping, you know you had a bad coil. Other possibilities for misfire could be the electronic ignition module or the pick-up coil inside the distributor(if you even have a distrib.)
FYI: code for o2 sensor means that circuit has a malfunction, may be the sensor itself, or a wiring problem. Good luck.

Oct 12, 2011 | 1997 Chevrolet Blazer

1 Answer

Motor is skipping, lacks power,ck eng. light is


A flashing light means you're actively misfiring. Have the ECU scanned to find out which cylinder it is. Bad coil packs are common and there is a recall for them. Call a dealer with your VIN number and if yours qualifies, you'll get four new ones free. If not, buy a coil pack for each cylinder that is indicated as misfiring and replace them. They're $35 at AutoZone and about $160 at an Audi dealer.

May 15, 2010 | 2000 Audi A4

2 Answers

Flashing check engine light


Flashing is bad, the engine is misfiring....you may have already damaged the cat converter by driving that way. Get it repaired before more damage is done.

May 11, 2010 | 1997 Nissan Maxima

3 Answers

Hard shifting, ilding rough check engine light flashing


If the CK ENG light is flashing, that means its running bad enough to damage the cat converter. Have that checked ASAP.

Nov 23, 2009 | 2003 Chevrolet Silverado 1500

1 Answer

1996 lhs engine light is blinking


a blinking eng light usually comes with power loss and shaking as the vehicle is misfiring. Scan the vehicle's computer as this would give you a starting point. Codes P0300, P0301, P0302, P0303... would indicate misfires detected in particular cylinders inspect ignition components and repalce as needed

Nov 16, 2009 | 1996 Chrysler LHS

1 Answer

97 ford ranger/check eng. light on/P1443 DTC


P1143 Air assist control valve range/performance

Could Be your mass air flow sensor. Start there.

Jun 09, 2009 | 1997 Ford Ranger SuperCab

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