Fuel filters for GQ Diesels....

Submitted: Sunday, May 09, 2004 at 19:30
ThreadID: 12729 Views:1463 Replies:3 FollowUps:1
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Oh,,, and to add to my earlier post about fuel filters.... This is for later model GQ diesel drivers....

There is a gauze style filter way inside the incoming fuel entry hole in the injection pump which is easy to get to ( just undo the barrel union bolt and remove, then pull out compression spring and then lift out gauze filter with a hooked bit of thin wire and clean that also )....... It stopped most of the black smoke under load and it felt like another 20hp on tap..... It was very chocked up with crap....Made quite a difference.... I dont think GQ's under 1995 have this gauze...

Just incase someones suffering from black smoke and lacking power syndrome and had been quoted $600 for injectors, maybe try that first.... Worked for me..
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Reply By: Truckster (Vic) - Sunday, May 09, 2004 at 21:09

Sunday, May 09, 2004 at 21:09
I think it was the GQ2 in late 91 that changed. Most have had them removed by now!

try Hi Flo in Springvale, they do a thing where you can go pick em up, take home change then take the old ones back.

Personally I used BJ Diesel in Dandenong. I think they are now part of the Dynamic Turbo Company
AnswerID: 57897

Reply By: cokeaddict - Sunday, May 09, 2004 at 23:54

Sunday, May 09, 2004 at 23:54
Hmmm interesting that, Now im wondering if this may have something to do with engine not wanting to rev past 3000.
Ive heard that the 4.2 diesel should go way past that. funny thing is, this is my second GQ and both wouldnt rev past 3000. with this one i have now, if I flat foot the throttle and watch tacho rise, as it hits the 3000 mark, I get a dash light come on, I believe it to be a warning for air restriction somewhere, Its a yellow coloured light sits at bottom of gauge. Be nice to get the extra revs out of the old girl.
AnswerID: 57917

Follow Up By: colin - Monday, May 10, 2004 at 11:08

Monday, May 10, 2004 at 11:08
your right you should be able to keep on reving, i have a 92 GQ 4.2 diesal with 270,000 ks and it will keep on reving way past the red line no probs at all. Col
FollowupID: 319701

Reply By: rooooboy - Monday, May 10, 2004 at 14:07

Monday, May 10, 2004 at 14:07
Its true the Diesels should REV more than 3000RPM but its not good for them, I wouldnt exceed 3000rpm at all, they make peak torque at 2200rpm, if you drive em that high youll get crap fuel economy, and useless power!

AnswerID: 57977

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