# Toooo much fuel **URL:** \ **Category:** Power/Fuel\ **Tags:** jeep, gasoline\ **Created:** [February 25, 2008, 11:04pm UTC](https://community.cartalk.com/t/toooo-much-fuel/11130 "2008-02-25T23:04:08Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 25, 2008, 11:04pm UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/1 "2008-02-25T23:04:08Z")
1886 Jeep Cherokee 4 banger. The fuel injection system is feeding to much fuel. I’ve checked all the computer inputs and they check ok. It runs for a few seconds then fouls the plugs out black with soot. Any ideas? ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [February 25, 2008, 11:13pm UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/2 "2008-02-25T23:13:06Z")
Have you considered replacing the injector? Perhaps after 122 years it’s not closing properly? ---
**Author:** ![cappy208](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cappy208/32/31_2.png) [@cappy208](https://community.cartalk.com/u/cappy208)\ **Post date:** [February 25, 2008, 11:15pm UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/3 "2008-02-25T23:15:49Z")
too much fuel usually means either a faulty fuel input, or not enough air. possibly a 122 year old air filter needs changing too! ---
**Author:** ![cappy208](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cappy208/32/31_2.png) [@cappy208](https://community.cartalk.com/u/cappy208)\ **Post date:** [February 25, 2008, 11:16pm UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/4 "2008-02-25T23:16:18Z")
or too much oats or hay ---
**Author:** ![Bill\_Russell](https://avatars.discourse-cdn.com/v4/letter/b/e5b9ba/32.png) [@Bill\_Russell](https://community.cartalk.com/u/Bill_Russell)\ **Post date:** [February 25, 2008, 11:18pm UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/5 "2008-02-25T23:18:28Z")
perhaps we can use some parts from the 20002 Camry. ---
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 26, 2008, 12:32am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/6 "2008-02-26T00:32:46Z")
All inputs check OK. some are go/no go, some are 0-5 vdc I’m running open throttle body (no filter) ---
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 26, 2008, 12:36am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/7 "2008-02-26T00:36:04Z")
The injector closes tight. When I run the fuel pump only there’s no leak by into the body. ---
**Author:** ![cappy208](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cappy208/32/31_2.png) [@cappy208](https://community.cartalk.com/u/cappy208)\ **Post date:** [February 26, 2008, 12:58am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/8 "2008-02-26T00:58:27Z")
since it has a real carb, have you replaced the distributor cap? maybe you didn’t get the index correct? was this running well before? what has happened to it since? what have you done to it, before, and since? ---
**Author:** ![cappy208](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cappy208/32/31_2.png) [@cappy208](https://community.cartalk.com/u/cappy208)\ **Post date:** [February 26, 2008, 1:07am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/9 "2008-02-26T01:07:49Z")
related to the other recent post, possibly the auto choke is stuck on, thus the apparent fuel overload? ---
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 26, 2008, 1:09am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/10 "2008-02-26T01:09:48Z")
what part of FUEL INJECTION don’t you understand? … a real carb. What’s that got to do with the distibutor anyway? Geee let’s see … one day it ran and the next day it didn’t. ---
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 26, 2008, 1:13am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/11 "2008-02-26T01:13:22Z")
Hmmmm … finally, a new idea. Tell me about the auto choke. ---
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 26, 2008, 1:26am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/12 "2008-02-26T01:26:41Z")
Throttle Body Injection system doesn’t have a choke. ---
**Author:** ![willey](https://avatars.discourse-cdn.com/v4/letter/w/a9adbd/32.png) [@willey](https://community.cartalk.com/u/willey)\ **Post date:** [February 26, 2008, 1:46am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/13 "2008-02-26T01:46:56Z")
How about the temp sensor input? If the ECM was seeing a constant temp of say… 20 degrees, it is going to have a very rich air fuel mixture. You should be able to check the resistance value of the sensor as it warms up to see if it changes. ---
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 26, 2008, 2:12am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/14 "2008-02-26T02:12:23Z")
thank you but I’ve check and rechecked all the input sensors. ---
**Author:** ![saltysnoopy](https://avatars.discourse-cdn.com/v4/letter/s/4491bb/32.png) [@saltysnoopy](https://community.cartalk.com/u/saltysnoopy)\ **Post date:** [February 26, 2008, 2:19am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/15 "2008-02-26T02:19:11Z")
question for all: How easily do catalytic converters clog? Would foul fuel clog it? ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [February 26, 2008, 3:08am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/16 "2008-02-26T03:08:45Z")
Mb, that is tooooo funny! ha ha ha ha ---
**Author:** ![americar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/americar/32/42_2.png) [@americar](https://community.cartalk.com/u/americar)\ **Post date:** [February 26, 2008, 3:19am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/17 "2008-02-26T03:19:57Z")
" Would foul fuel clog it?" Yes. Does this engine have a Map sensor? If so has that been tested? ---
**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\ **Post date:** [February 26, 2008, 3:24am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/18 "2008-02-26T03:24:13Z")
Check the fuel pressure. We’ve seen this problem with bad fuel pressure regulators. I had one Ford Bronco that was spittig black soot. The mechanical pressure gauge fluctuated between 20 psi and 110 psi. The idle also flutuated in time with the pressure fluctuations. A new pressure regulator fixed the problem. BTW, the ODB-II system does not monitor the fuel pump or pressure, only feedback from the injectors. ---
**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\ **Post date:** [February 26, 2008, 4:42am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/19 "2008-02-26T04:42:13Z")
Change the injector. If it hust pops into the throttle body it probably only costs $80. I had a black spot behind the Tempo when I started it in the snow. The spot stopped happening when I got the new fuel injector. If you look at the injector when it’s working and you see any fuel dripping down the horn of the throttle bore, the injector is shooting a stream of fuel there. If you have a carburetor, never mind. ---
**Author:** ![JayWB](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@JayWB](https://community.cartalk.com/u/JayWB)\ **Post date:** [February 26, 2008, 5:21am UTC](https://community.cartalk.com/t/toooo-much-fuel/11130/20 "2008-02-26T05:21:11Z")
What resistance did you read when you checked the Engine Coolant Temp Sensor? This sounds like a textbook case of a failed CTS. [Next page](https://community.cartalk.com/t/toooo-much-fuel/11130.md?page=2)