98 Isuzu Rodeo vacuum diagram

1. P0100 Mass Air Flow Sensor
2. P0300 Random Cylinder Misfire
3. P0442 Evaporative Emission

MAKE SURE THE CONNECTIONS AT THE SENSOR ARE GOOD,ALSO CHECK FOR VACUUM LEAKS,HERE'S A LINK TO YOUR CODE,THE OLD SENSOR MAY BE GOOD,JUST A VACUUM LEAK, P1133 Chevrolet HO2S Insufficient Switching Bank 1 Sensor 1

http://www.carforum.net/transmissions-drivetrain/15664-isuzu-rodeo-4wd-wont-engage-clicking-noise.html
see post 9

you could have a vacuum leak somewhere. check the fuel filter, it may be going bad. and battery. all these will cause a random misfire code. as well as your plug wires. intake air leak, spray carb cleaner around intake manifold while engine is running if the idle changes, then you have a leak. Good-day! but check for vacuum leak first! a vacuum leak will cause engine to hesitate and lose power.

check for the other end near one of the cylinder heads (the part of the motor above the spark plugs) or possibly on the brake booster. Brake boosters are the big, usually black, drum looking thing close to the firewall. The front of the intake manifold also has vacuum lines sometimes. good luck, if you post with pictures I could try to find the trouble hose. Good Luck!

Need a vacuum line diagram for a 2001 isuzu 3.5 engine.

Hi.

A failed start can happen for a number of reasons. If this happened just once, it should not be reason for concern.

If the problem happens again, the first test you can do to locate the problem is an OBDII code scanning.

The scan can be done at any local garage. If you purchase a scanner like the ones linked below you can read the codes by yourself.

OBD-II-Scan/dp/B001LHVOVK

OBD2-Trouble-Code-Reader-Scanner

The connector is located under the dash.

Once you have the codes you can get back to us for an explanation. Here you can also find basic info on OBD codes.

If the problem happens regularly, then other test that must be done is checking fuel and vacuum pressure using a Vacuum and Fuel Pump Tester. This is a gauge that must be placed in between the lines to read pressure.
By reading fuel pressure it is possible to spot problems caused by blockage, fuel pump malfunction and problems with fuel pump aeration.
By reading pressure on vacuum lines whilst heating the lines with an hand torch (this must be done by a mechanic), you can find vacuum leaks.

Engine shut down can be caused by a number of reasons. Among possible causes misfire, rich or lean mixture, air intake blockage, MAF or AIT sensor problem, fuel circulation problem, vacuum problem, fuel tank cap not allowing air in, electronic injection problems.

If you get the problem again, read codes and replace spark plugs, air filter and fuel filter.

Regards.

well could be faulty coil packs could be bad grounds(corroded)

how do i know if it's a vacuum leak in my 1999 isuzu rodeo 2wd 3.2l

your idle speed is controled by the computer on this car. so yo could have a variaty of things going on here. but i am willing to bet you have a leak some were on the intake to see if it is your intake gaskets wich is common on newer cars you can buy a can of brake cleaner and start the car and spray it on the out side of the intake. but be carefull not to get any electronics or the throttel cabel with the cleaner. if your intake gasket is leaking you will hear a drop in the engine Rpm.