[5ABI VT]

Originally Posted by mhobtr

I wouldn't replace a working fuel pump just as a precaution. There is a good chance the new one will not be as reliable as the one it replaced.

If you are worried about being stranded, get one of the primary/secondary reverse harnesses so if your primary pump dies, you can get home on the secondary.

Last year I replaced the entire pump assembly on my 91 with a NIB ACDelco unit. Never was pleased and turned out the check valves in both pumps were bad. Replaced the pumps and everything's great now.

BTW, if you buy new pumps, make sure the check valves are working as soon as you take them out of the box. If not, you can get a replacement or refund and not get stuck like I did.

I did change my pumps that were working fine and I do regret it. I have a slight hesitation that I noticed a few times last summer at wot shifting gears. It has me thinking about the clutch but the truth is if the clutch slips Rpms will rise and this is more of a hesitation or a ever so slight pause in acceleration after a hard fast shift. So.. one thing had bugged me from the beggining is one of the pumps I used had a completely different rattle to it and it's been in the back of my mind. I also did use the plastic clips and I'm wondering if they may have come off as well so I've been wanting to tear in there again and replace them while I'm in there with a high performance pump and use better steel clamps.

Originally Posted by Roadster

Interesting thread, a good read....
After reading some other fuel pump threads back in April, I started doing some research about the pumps. Although I have a back up set from Rock Auto, I wanted to check out more info on different pumps.
The one that caught my interest was the Denso Fuel Pump. I know at least one member has them installed. I think the units installed are:
DENSO #951-5016. So checking them out further my info showed me that this particular # is for the LT1 and not the LT5. And let me say that in no way am I referring that this person installed the wrong part. I am just posting the info from my research. And I am not implying in any way that this part # does not work on the LT5, because this member is using them and to my knowledge is very satisfied.
The number that I found to be for the 90-95 LT5 is: DENSO #951-5006
I don't know or have any knowledge of the specs for the two part numbers listed. Again I am just relaying the info that was relayed to me.
Both part #'s to my knowledge are direct fit units. The Denso units can also be a little more expensive, but not over the top.
The Fuel Pump Filters # DENSO 952-0094 are also listed for the LT5.

As of now the 951-5006 pumps are on National Back Order and should be available sometime in the near future for anyone interested.
Just thought I would pass this along......

This is interesting because I'm not sure but this may be me you are talking about ! I appreciate you posting the research. I had no idea and never cared to really look into the fuel pump part numbers. I had been planning to change my pumps because on install one pump had a distinct rattle that bothered me (think I posted a video of the rattle -if not will do it today) and I also didn't use the screw steel clamps. For some reason when I think about the plastic becoming brittle and being under stress if overtightened it only makes sense they can split and break easily leaving the hose free to shoot off (pretty sure that's what others have mentioned) . SO... I ordered the twin walbro pumps from Lingenfelter. Not cheap but I feel much more comfortable with Walbro pumps from them. Will post again when they come and I tackle it. Will also change my fuel filter again too.