Question about 1993 Isuzu Rodeo
New fuel pump installed a few months ago
It appears that you have a fuel supply problem in that there is not enough fuel getting through. Items to check include kinks in fuel lines ,blocked fuel filter, correct fuel cap on tank. other points to check but will require test equipment is the pressure regulator in the fuel manifold and regulated return valve Further points to check If you have a catallic converter in the exhaust system they are prone to cracking in the converter which in turn blocks the outlet of the unit creating severe back pressure in the engine reducing performance under revs. with the engine off get under the vehicle and bump the converter by hand and if it rattles it most likely will be the fault
Posted on Jan 05, 2013
Testimonial: "Thank you Bill for your suggestions. I'm sure that by now, you've read the testimonial that I left on another persons page. I don't want to take up any more of peoples time. Anyway...Mechanic is taking care of the converter Friday and I thank you again! Haden"
Someone would need to check the fuel pressure with a gauge and replace the fuel filter to eliminate the pump. Assuming the check engine light is not on, it could be a vac leak or other problem.
The most common problems are a leaking EGR valve or faulty throttle position sensor, but those components should make the check engine light come on if they fail.
Posted on Jan 05, 2013
Testimonial: "Stephen, I had a head scratching conversation with my mechanic over the past few days. My Rodeo was towed 3 miles to his shop yesterday morning. My check engine light never has come on for any reason big or small when it should have. Mechanic calls last night and asks when was the last time I put gas in the car? My reply: Filled up Last Monday...why? Is it bad gas? He then said he started with replacing the EGR valve because it did indeed need replacing. He did ask to do that in Oct. and I said no. My bad. Throttle sensor comes into play too. He did this work all day yesterday getting zero results. He then said that he drained my gas tank only to find out that not even 1/2 gallon of normal gas came out. My gas gauge hasn't worked for a longtime and he was made aware of that. I reset the trip counter when I fill up the 20 gallon tank and let her go 300 miles in hopes that she gets 15 mpg and she has. Usually when I refill....she takes 16-18 gls. He says that my tank is so wide that 1/2 gln of gas won't even cover the bottom of it. Whew! That's bone dry to me! My trip counter says 260 miles. He put $15..3gl in it. And she runs great....in fact....better. My son came over for this past weekend. We were installing a sound system in his Jeep. We used the garage of course because it was too cold outside and my Rodeo had to spend the night out there. Son calls me to hear the results from the mechanic. I was so embarrassed to say....Damn thing didn't have any gas! He said "Dad...everytime I come to your house for the weekend....I'm always 3-5 glns shorted!" We have a gas thief in our area that has totally wasted so much of ALOT of good folks' time and money! They lowered gas prices a little bit and people still won't buy their own. I'm really sorry for taking up all of you alls time just reading this embarrassment. Had all this happen due to only my ignorance....oh my...it'd been some funny S&^%! I don't care who you are! Thx Stephen, Haden"
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Posted on Jan 02, 2017
I realise you have probably solved this problem by now so sorry for the late news mate . Had a similar prob and it turned out to be an alternator malfunction . I replace the brushes and off she went . These things send voltage from the alt . to a fuel pump relay or whatever so the pump wont run if the eng isn't (or the alt isn't outputting any voltage.) . Hope you already had it sorted . But I hope this helps if not . Cheers Simon .
Posted on Aug 15, 2009
SOURCE: i have a 93 isuzu
check for a leaking fuel rail,or injector,or the fuel pressure regulator,which is a vacuum operated valve at the end of the fuel rail.the high idle is caused by a vacuum leak,and if the regulator is leaking,that could be the fuel smell
Posted on Oct 28, 2010
All of the symptoms that you have talked about point to a fuel pump that is starting to fail. I would take it to a mechanic and have the fuel pressure checked. It is a simple procedure and should be rather inexpensive.
Posted on Dec 28, 2010
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