GQsweep
12th August 2014, 10:43 PM
I'd like to start a conversation about the carburettor on a 4.2 petrol. I've had my '90 GQ since 2001. Doesn't get a whole lot of use, mainly 'cause of it's thirsty habit.
I bought it primarily to tow a boat but I love it and am determineed to keep it. It tows well and it's very capable off road especially in sand.
I know little about it's history prior to me but it had 99k on it when I bought it and on the way home from buying it the odo clicked over to 100k and stopped. Since then it works intermittently. It still only reads about 150k but it's done probably twice that since I've had it. Short answer - I have no idea of it's mileage! It runs well, generally, and I've spent some serious money on brakes the auto etc in the time I've had it. It's a great toy!
A few years ago it started playing up a bit and when I investigated the carburettor I found hoses cut and blocked and a vacuum thingy disconnected etc. Someone has had a good go at disabling 'things' on it. The Nissan service manager at that time checked it out and said, words to the effect of "I have no f…… idea what's been done here, my advice is to leave it alone while it's running and forget about it."
Well that's what I've been doing but lately the little hesitations and the odd backfire, rough idle and sometimes fast idle are getting me down.
When I look at the carb, it freaks me out with it's complexity - I'm used to SU's.
I want to hear from those who have overhauled their carby or changed their carby for something more straight forward.
Sorry for the long post, I hope you were able to put up with my ramblings.
I bought it primarily to tow a boat but I love it and am determineed to keep it. It tows well and it's very capable off road especially in sand.
I know little about it's history prior to me but it had 99k on it when I bought it and on the way home from buying it the odo clicked over to 100k and stopped. Since then it works intermittently. It still only reads about 150k but it's done probably twice that since I've had it. Short answer - I have no idea of it's mileage! It runs well, generally, and I've spent some serious money on brakes the auto etc in the time I've had it. It's a great toy!
A few years ago it started playing up a bit and when I investigated the carburettor I found hoses cut and blocked and a vacuum thingy disconnected etc. Someone has had a good go at disabling 'things' on it. The Nissan service manager at that time checked it out and said, words to the effect of "I have no f…… idea what's been done here, my advice is to leave it alone while it's running and forget about it."
Well that's what I've been doing but lately the little hesitations and the odd backfire, rough idle and sometimes fast idle are getting me down.
When I look at the carb, it freaks me out with it's complexity - I'm used to SU's.
I want to hear from those who have overhauled their carby or changed their carby for something more straight forward.
Sorry for the long post, I hope you were able to put up with my ramblings.