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Posted on May 08, 2012
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Engine hunting 1.8 rover 25 techtronic gearbox, automatic. the engine has started to "hunt" when cold, and has blown fuse often when starting cold. runs fine when warm, but warning light for "powerdrive" lights when fuse blows ! could this be a simple problem ( low transmission oil) or some underlying serious fault ? it's a 2001 car, 120,000 miles, last full service unknown but has run fine for 5 years

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Colin Stickland

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  • Cars & Trucks Master 22,516 Answers
  • Posted on May 09, 2012
Colin Stickland
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Joined: Nov 04, 2008
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What a lovely car -if it was a manual ,i have a diesel manual one and its a flier ,as for this iam not sure so try reading the codes but if this is a gearbox related fault car then its the scrapyard as this car has no value in the UK but if stuck for spares look here in spain as no end of these cars running around and well appreciated here they are as well .This hunting when cold is the puzzle as it could be gearbox related whereby the gearbox computer is operating the engine RPM idle to stop creep but iam just not sure as i never see any autos of rover just manuals

5 Related Answers

Anonymous

  • 50 Answers
  • Posted on Oct 03, 2008

SOURCE: VW Polo oil warning light

this would not be in effect of any oil leaking i would say your oil sensor has gone and would need to be checked out by a auto electrician. i hope this helps .

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Anonymous

  • 1 Answer
  • Posted on May 01, 2009

SOURCE: audi tt 180 quattro car wont start. EPC and E-M system lights on

I would suggest you check oil levels etc. Generally these cars suffer from the air mass meter / air sensor problems aswell as coil problems too. Did you ever get a solution to the problem?

Molson02536

Harvey N Tawatao

  • 3854 Answers
  • Posted on May 11, 2009

SOURCE: Low oil pressure light goes on until car warms up. Oil level is good

The oil pressure sending unit has gone bad. I sending unit is just above the oil filter and you can get to it from the top. When you face the Engine look down towards the oil filter, the oil pressure sending unit is just above that and it looks like a cylinder with two wires coming from it. If you don't see it, it's right between the exhaust manifold and oil filter.
If you go to Auto Zone or Parts Source, they'll have the oil pressure sending unit and the step by step instructions, When installing the new sensor. Do not use teflon tape or any sealant, the sensor is tapered and need's the good ground from the engine to give you right readings.
Good luck and hope this helps.

Anonymous

  • 4 Answers
  • Posted on Jul 21, 2009

SOURCE: 98 Catera goes into "Limp Mode" after warm up.

have you check you ignition coil packs.

Anonymous

  • 432 Answers
  • Posted on Sep 02, 2009

SOURCE: 2006 Subaru Impreza. Oil warning light stays on

No, just keep an eye on it to see it does not start staying on longer and longer. The oil pressure sensor my be a little off,and at worse the oil pump is a little weak. Just keep up on the oil changes.3500 miles max.

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0helpful
1answer

Where is fuel pump relay 2007 Toyota Yaris

must there be one? HUnt #100006
hunt day .
no engine told and is 100% engine related.
no country told ,sorry they are not the same cars drive-lines nor EFI.
USA 1NZ-FE engine, this, well now I answer
the PCM must want to engerze the FP relay and not scanning the PCM you will never know why

ign fuse. not blown and C/OPN relay
and EFI relay not dead
and EFI fuse to that not blown. why not check all fuses? 1st the scan the pcm.
locations?>, ouch 24 pages of relay location in the SM
page 15 bingo found it reading ThE SM to you.
[Instrument Panel J/B Inner Circuit, C/OPN


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Fuel pump relay and fuse location on 2006 ram 1500 quad cab 4x4 4.7 magnum v8

scan the PCM first. it will tell you what failed. easy if true pump fails.
just a hunt, no problem told at all, engine dead?
the ECU cuts fuel 1 or 2 ways if it detects spark bad.(gross)
and some cars the pump only runs, cranked, or engine runs
some cars do not have pump prime pulse. or like the bosch pumps are dead silent now (and sold as such) so we check pressure not wanting guess.
now to end the hunt, reading your service manual too you.

SM manual states on page for FUEL pump
this. fact
A separate fuel pump relay is no longer used. A circuit within the TIPM (Totally Integrated Power Module) is used to control the electric fuel pump located within the fuel pump module. The TIPM (1) is located in the engine compartment in front of the battery.
so STrIKE 1, no relay. (means a power transistor runs the pump.
so now the fuse. FUSE hunts
The TIPM fuse box not one fuse named fuel pump. ABS yes.
that means and electronic regulator is used here. like most new cars have. making no fuse needed at all ever.
not scanning the PCM first is the problem 99% of the time
and now the schematic. of it. Below, double proving facts
hard proof of above.
one more hunt goes bust,. (endless here and sad)
one could call it a TIPM electronic regulating dynamic fuse.
because it is. it is deep inside the TIPM PCB chips set.



norelay-undefined-undefined-0.jpg
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1answer

Idle up down

hunting or surging ilde. name the 2 RPMS, low and high , is it hot or cold engine this issue.? 400rpm or 1000 or 2000 all are diff.causes.
no year, stated. so cant help.
but ill answer in the generic,
1: the ECU (got a carb,? )
the ecu controls idle speed at all times.
if not , there is a problem (you)
A: air leaks in the induction will make motor race at some point the ECU/ISC loses control. and hunts. trying hard to correct it.
b: egr stuck open idle too low, iSC cant correct it,, bad EGR.
c: engine EFI running way too leak starving for fuel so it hunts for 2 reasons < ISC hunting, and lean does that.
lean is gross power loss and opening throttle bogs the engine.
so is double bad. ISC makes it worse,

all this breaks down to 2 reasons.
1: ISC bad. in some way (gummed up. or restricted inside)
2: bad fueling or air leaks. vacuum leaks.

try answers , the hot cold question and the 2 speeds, of the hunt.
lowest rpm and highest of the hunted range of RPM.
0helpful
1answer

I replaced the governor diaphragm in my 2h in my hj47 1984 ute and now the engine is hunting at idle between 650 and 860 rpm, it doesn't matter if it is cold or warm. Engine doesn't hunt at hi

You may have this posted in the wrong product category. Please select another category appropriate to the problem and re-post the problem so the correct expert will see and respond to the question..
This is for car and truck problems related to factory installed systems not add on aftermarket systems.
This post can't be removed or moved, please re-post the question in the correct product category. Thanks

0helpful
2answers

Rpm hunting

check for a vaccuum leak this is where i would start if it rolled into my shop. possibly a PCV valve sticking or a hole in the hose, this hose should run from the valve cover, or crank case and then to the intake, or carb.
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1992 civic automatic idles okay when cold engine, but idle fluctuate 800 to 2500 RPM when engine hot

" Hunting" is usually indicative of a faulty temp sensor or air flow meter telling lies to your computer.
It can also be vacuum leaks, however these are usually apparent even when cold.
Male sure you don't have any air locks in your cooling system.
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98 galant motor stalls - dies when gas is pressed

I would take a look at possiable damage to the PCM (powertrain control module)
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