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Bosch Motronic 7.9.7 runs badly when cold. Starts fine buts runs ruffer and ruffer untill it detects misfire on cyl's 1&3. Stopping and restarting the engine clears the problem. CTS and crankshaft sensor repl w/o success. The car is a LADA NIVA 1,7i -06 MPI

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What are theses codes for 99 Chevy Prizm 171,300,302,304?


171 Sys lean bank 1 possibly o2 sensor 300, cyl misfire detected random cyl. 302 misfire cyl # 2. 304 cyl misfire cyl #4 with all 3 of these codes it might be time for new spark plugs and wires

Sep 03, 2014 | Cars & Trucks

1 Answer

2000 tundra v6 5-speed cold start truck runs great, park it for 20-30 min it will start fine but after going 1/4 mile it dies, looses power. pull over and it will backfire and sputter until it eventua


bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.

just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?

Jan 31, 2014 | 2000 Toyota Tundra

1 Answer

I have 1986 porsche 944 it start and shuts of what could be the problem.


I hate to say it, but, if it starts cleanly and quickly on all cylinders its likely to be a switch/sensor/ thermoswitch etc.
Does it run cleanly?
Are the fluid levels correct?
The fuel injection has a cold start system but the ECU needs information from intake manifold, water temp and incoming air flow to maintain its running.
Get on the web and go to Porche owners forums or find your nearest (Bosch?) agent to help.
Wikepedia says there are 3 engines and they use Bosch Motronic systems. See what yours has and search for diagrams/handbooks etc on the web/ebay. There's piles of stuff out there for Bosch systems.

Nov 05, 2013 | Cars & Trucks

1 Answer

After my 94 plymouth voyager 3.0L gets to runnig temp it misfires and stalls once in gear.It runs fine when its cold. I did a tune-up and still have the same problem


Have fuel pressure checked when it starts to misfire/stall and driving down the road at normal speeds.
Not unusual for fuel pump to run at proper pressure when cool, but lose pressure when warmed up. If it's only running bad when off accelerator and stopping or turning and runs down the highway good, remove and clean AIS/IAC motor. ( idle speed motor ) Once cleaned, if it runs better for a while then starts to act up again, replace it.

Jul 16, 2011 | Plymouth Voyager Cars & Trucks

1 Answer

2002 liberty 3.7 liter. I have replaced the coil, plugs and injector for cylinder #6. On cold starts I get a ramdom misfire code and engine is missing. If I re-start 3-4 times engine starts up and runs...


If you have Coil- on -Plug you haven't found the bad one yet

Your not always going to get a code that is correct
e.g.PO304,PO305 etc

I would buy the injector from you, as I'm sure that wasn't it,
unless you have an air leak around it

You want no vacuum leaks,a near new EGR Valve,no
air induction tubing leaks

Clean the MAF Sensor with CRC MAF Cleaner

Clean Throttle Plate--CRC Throttle Body Cleaner

You did put anti-sieze on those spark plugs, if not
do so.

How old are the O2 Sensors
More than 80,000 mile,replace the front 2 with OEM
Specific Make--Bosch or NGK etc and not some
cut & splice universal type

Feb 01, 2011 | 2002 Jeep Liberty

1 Answer

P0303 and P1300 together (Cyl. 3 Misfire)


CODE P1300 IS MISFIRE DETECTED FUEL PROBLEM. WHICH MEAN 3 FUEL INJECTOR IS CLOGGED UP.HAVE FUEL INJECTORS CLEAN AND CHANGE FUEL FILTER.

Jul 24, 2010 | 1999 Audi A4

1 Answer

2006 Nissan Titan alternating misfiring and running fine until !


My truck is doing the exact same thing. I have been told it is the Intelligent Power Distribution Module or IPDM. The Nissan Dealership that is working on my truck says $400.00 parts and labor to fix.

Jul 19, 2010 | 2006 Nissan Titan

1 Answer

Multiple cyl misfire


please check on compression of all the cylinders. IF there is any valve damage this could cause a fault.Please check this out if your fuel and spark are ok.

Jun 28, 2010 | 2002 Chevrolet Camaro

2 Answers

98 camry engine light on w/misfires & system too lean


take sample of your fuel into clear plastic bottle from fuel line
is there any water present?
this can cause these codes and then not go on storing codes for other bank even though that bank will be missfiring also due to water & P0300 Random/Multiple Cylinder Misfire Detected being logged
check all connections to coils/leads & wiring connectors
due to miss fire codes for cyl 1,3,5 all on the same bank
also look and check for air leaks on that bank (hose knocked off or splithose)inlet manifold gasket,brake booster etc...
3 injectors being blocked slightly on same bank posible!!!
check wires and signal

was it running like this b4 tune up & repairs?
this is what codes are
P0170 Fuel Trim Malfunction (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected

the last code is for trans due to misfire/running lean on bank 1 probably a torque problem code
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May 29, 2009 | 1998 Toyota Camry

2 Answers

Daewoo lanos 2000 car is misfiring and wont run properly firing on cylinders 1 and 4 misfiring


have you changed the ignition wires? perhaps firing order crossed? if not coil pack or ignition wires faulty how do you know it is not "FIREING" on 1 & 4 have you tested it with a spark tester tool???

Dec 23, 2008 | 2000 Daewoo Lanos

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