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View Full Version : Possible fuel starvation?



SKID
22nd October 2015, 06:44 AM
I have read many places about "the tiny thimble size filter" Just replaced my filter and added a water separator type one with a glass bowl as a pre filter to the standard one, I have been experiencing when I really give it berries up a hill from around the 2K-3K rev mark it hesitates as though it is starving of fuel, But if I rev it when I'm parked, it revs out well up to the 4K mark with no hesitation. I followed the instructions here today to try and get the "the tiny thimble size filter" out but it appears there isn't one in there as I can poke a bit of wire about 2-3 inches down the hole. I've only owned the truck for two months, it was originally a 200 GU 3Ltr but when the guy blew the motor up he put a 1990 silver top in. When I was getting the air con re-gassed 2 weeks ago the guy made comment that the injector pump looks new, I've read that some of the later model cars don't have that tiny filter, if the pump is in fact new could it be a case of if or when it was reco'd that they never put the tiny filter in? I already had the feeling of fuel starvation before I added the other filter and replaced the existing one, putting the foot down I was lucky to get 3000RPM out of her
After the initial priming of the fuel and the hand pump is hard I know with in a short time after driving to say the shop and back that I can usually get a further 5 or so pumps before it goes hard again, is this normal?

SKID
22nd October 2015, 01:46 PM
Bought a little pump today and mounted it between the 2 filters, will see if that helps..
4-9 Psi 100 LPH Fuel pump Petrol Diesel Ethanol Bio Diesel

SKID
22nd October 2015, 04:01 PM
Took it for a run and for first K or so didn't notice any difference, then after that freely rev's past 3K, will see if its just my imagination or not in time, but it seems the little pumps is doing something....

threedogs
22nd October 2015, 05:30 PM
http://www.ebay.com.au/itm/361118302400?_trksid=p2060353.m1438.l2648&ssPageName=STRK%3AMEBIDX%3AIT

Most woulf fit this pump. good to hear you have it revving again

SKID
22nd October 2015, 06:38 PM
I'll install a better quality pump when funds are available

SKID
25th October 2015, 09:39 AM
By passed everything as you said, for first drive sinking the boot in it coughed wrc for the first hundred yards, think that might have been a little air, then doing a large lap of the block can easily rev it out to 3200RPM, have now put everything back together so primary filter then lift pump then factory filter. So it looks like my problem might have been a clogged factory filter to start with.. Wasn't game to push it too hard only revved up to 3200RPM but felt like I could push it further... thanks for the suggestion, have not got around to checking if there is a thimble filter in the actual pump. will get around to it during the week...