Weird fuel leak...
#1
Weird fuel leak...
New problem that popped up about four months ago, has come and gone, and I don't want to drive her again until it's fixed:
Sometimes -- not all the times, sometimes -- after starting the car up cold in the morning, I can get about 2 blocks from the house and suddenly I smell raw gas strongly in the cabin. Open the hood, gas is pooling all along the top of the intake manifold just under the fuel lines and injectors. I've yet to be able to catch it in the act of spraying the fuel.
We replaced all the fuel lines and all the hose clamps. The problem is still there. We're doing it again just to make sure we didn't damage lines upon install.
This never happens when the car is hot. So what I'd like to hear from you guys is, is this something else? Maybe fuel pressure regulator issues? Instead of a leak, could it be that the system has too much pressure in it when cold?
Jess
Sometimes -- not all the times, sometimes -- after starting the car up cold in the morning, I can get about 2 blocks from the house and suddenly I smell raw gas strongly in the cabin. Open the hood, gas is pooling all along the top of the intake manifold just under the fuel lines and injectors. I've yet to be able to catch it in the act of spraying the fuel.
We replaced all the fuel lines and all the hose clamps. The problem is still there. We're doing it again just to make sure we didn't damage lines upon install.
This never happens when the car is hot. So what I'd like to hear from you guys is, is this something else? Maybe fuel pressure regulator issues? Instead of a leak, could it be that the system has too much pressure in it when cold?
Jess
#3
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,888
Received 10,944 Likes
on
7,190 Posts
The following users liked this post:
JessN16 (09-12-2018)
#5
the gasket comes with the injector, it is just a thin paper gasket, you can trace the base of the cold start injector to make a new one.
they rarely leak but the body of the injector can leak, but not as much as pooling liquid fuel.
if it is an intermittent fuel leak, I would look closely at the injectors.
they rarely leak but the body of the injector can leak, but not as much as pooling liquid fuel.
if it is an intermittent fuel leak, I would look closely at the injectors.
The following users liked this post:
JessN16 (09-13-2018)
#6
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,888
Received 10,944 Likes
on
7,190 Posts
Cheers
DD
The following users liked this post:
JessN16 (09-13-2018)
#7
the gasket comes with the injector, it is just a thin paper gasket, you can trace the base of the cold start injector to make a new one.
they rarely leak but the body of the injector can leak, but not as much as pooling liquid fuel.
if it is an intermittent fuel leak, I would look closely at the injectors.
they rarely leak but the body of the injector can leak, but not as much as pooling liquid fuel.
if it is an intermittent fuel leak, I would look closely at the injectors.
Given that this problem only happens when cold, I'm betting that's the culprit.
Jess
The following users liked this post:
o1xjr (09-16-2018)
Trending Topics
#8
very possible it is keaking through its plastic body. What doesn't make sense is the pooling of fuel because as Doug says, only a small squirt of liquid fuel is injected through the CSI.
what if you disconnect it and block the hose so no fuel is dispensed at all from the CSI ?
Wouid you still get liquid fuel pooling?
what if you disconnect it and block the hose so no fuel is dispensed at all from the CSI ?
Wouid you still get liquid fuel pooling?
#9
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,888
Received 10,944 Likes
on
7,190 Posts
The cold start injector has fuel going to it at all times, just like the regular injectors. Of course, it only sprays fuel when the engine is cold....and if the starter is engaged.
Why it (or the regular injectors) would leak only when cold is a mystery to me.
I like Jose's idea. Pull and block off the hose to the injector. If the pooling stops, you've found your culprit.
Cheers
DD
Why it (or the regular injectors) would leak only when cold is a mystery to me.
I like Jose's idea. Pull and block off the hose to the injector. If the pooling stops, you've found your culprit.
Cheers
DD
#10
I had this symptom in the 1990s, The CSA was leaking. I replaced it and tthe problem was solved. It wasn't a cold starting problem, it was a fuel smell.
Believe it or not, I still have the leaking CSI since I have a box of "parts replaced". The CSI looks normal otherwise but when put in service it leaks as soon as you turn the ignition switch.
Believe it or not, I still have the leaking CSI since I have a box of "parts replaced". The CSI looks normal otherwise but when put in service it leaks as soon as you turn the ignition switch.
#11
UPDATE...
I think I've fixed this by replacing the cold start injector and the gasket.
What I wanted everyone to know is that I fixed this with factory-spec parts that are still available.
Cold-start injector (in AUS-to-US exchange rates, this came out about $130 shipped and took about a week to arrive): https://www.ebay.com/itm/New-Jaguar-...53.m2749.l2649
Cold-start injector gasket: https://www.partsgeek.com/catalog/19...ve_gasket.html
Jess
I think I've fixed this by replacing the cold start injector and the gasket.
What I wanted everyone to know is that I fixed this with factory-spec parts that are still available.
Cold-start injector (in AUS-to-US exchange rates, this came out about $130 shipped and took about a week to arrive): https://www.ebay.com/itm/New-Jaguar-...53.m2749.l2649
Cold-start injector gasket: https://www.partsgeek.com/catalog/19...ve_gasket.html
Jess
#12
#13
I'm fairly sure mine was gasket failure. The old gasket looked really rough, anyway. If it failed in the actual body of the injector, we couldn't get it to replicate the issue before changing it.
Since the new part was so cheap ($130-ish) I went ahead and did that anyway. I figured if you guys were seeing failures it was just a matter of time.
On that note, everything plastic in a 30-year-old car, regardless of whether it's Jaguar, Toyota, Ford, etc., is prone to failure and 30 years seems to be the really critical point. In my Mitsubishi Starion/Chrysler Conquest owners' group (my Starion is an 88 model), we've been seeing a lot of failures to the wiring connector at the coolant temperature sensor on the intake. A choppy signal from that sensor is responsible for what I'd conservatively estimate is a quarter of all running/drivability problems on that car. Another common failure point are the injector clips -- also plastic. Just a fair warning for all us Jaguar folks out there that once the car hits about the 30-year mark, every time you plug/unplug a plastic clip, it might be the last time you do that.
Jess
Since the new part was so cheap ($130-ish) I went ahead and did that anyway. I figured if you guys were seeing failures it was just a matter of time.
On that note, everything plastic in a 30-year-old car, regardless of whether it's Jaguar, Toyota, Ford, etc., is prone to failure and 30 years seems to be the really critical point. In my Mitsubishi Starion/Chrysler Conquest owners' group (my Starion is an 88 model), we've been seeing a lot of failures to the wiring connector at the coolant temperature sensor on the intake. A choppy signal from that sensor is responsible for what I'd conservatively estimate is a quarter of all running/drivability problems on that car. Another common failure point are the injector clips -- also plastic. Just a fair warning for all us Jaguar folks out there that once the car hits about the 30-year mark, every time you plug/unplug a plastic clip, it might be the last time you do that.
Jess
#14
Thread
Thread Starter
Forum
Replies
Last Post
jaguarxj8fan
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
2
09-10-2014 12:28 AM
daxter1987
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
1
08-23-2013 10:56 AM
cosworth
S-Type / S type R Supercharged V8 ( X200 )
17
12-08-2010 05:16 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)