Anyone have any ideas?
07-23-2010, 09:13 AM
#1
Registered User
Thread Starter
Join Date: Jun 2010
Posts: 275
Anyone have any ideas?
First things first engine light is on its been on just got a quick questions any ideas as to what could cause the following. ( I will be putting a computer on) I just wanna know if anyone knows "Hey oh yeah thats this part doing this" kind of answers.
In accelaration throughout the rpm ranges (all of them) especially going up hill when giving gas instead of a smooth coast through the rpm ranges it seems like its going through stages of power. In example up hill from a stop sign light gas makes it coast up slowly almost lacking power. Then more gas seems to jump to a whole different level of power. Full throttle seems like it takes a minute to find that power and then takes off to another level of power. There is no smooth accelaration at times and at other times it seems decent enough.
Was going to buy a fuel pressure guage this weekend and get exact numbers of pressure (my friend who had one dissapeared on me). I am thinking it is a fuel pump issue or FPR issue, I guess my questions is would it cause this kind of issues?
Also need link to nice OBD1 scanner and ALDL cable for serial port, todays payday so Id really like to get some good info/links today to get my shopping out of the way. Thanks everyone in advance.
In accelaration throughout the rpm ranges (all of them) especially going up hill when giving gas instead of a smooth coast through the rpm ranges it seems like its going through stages of power. In example up hill from a stop sign light gas makes it coast up slowly almost lacking power. Then more gas seems to jump to a whole different level of power. Full throttle seems like it takes a minute to find that power and then takes off to another level of power. There is no smooth accelaration at times and at other times it seems decent enough.
Was going to buy a fuel pressure guage this weekend and get exact numbers of pressure (my friend who had one dissapeared on me). I am thinking it is a fuel pump issue or FPR issue, I guess my questions is would it cause this kind of issues?
Also need link to nice OBD1 scanner and ALDL cable for serial port, todays payday so Id really like to get some good info/links today to get my shopping out of the way. Thanks everyone in advance.
07-23-2010, 09:19 AM
#2
Registered User
Join Date: Sep 2001
Location: Woodstown, NJ
Posts: 4,154
You're on the right track with checking fuel pressure and getting it scanned.
When the engine is under load, there is more cylinder pressure. If there are any weak plugs or ignition components, they will rear their ugly head and will cause a lack of power.
Check www.akmcables.com for the cable you need. Download Datamaster for free and you're good to go.
When the engine is under load, there is more cylinder pressure. If there are any weak plugs or ignition components, they will rear their ugly head and will cause a lack of power.
Check www.akmcables.com for the cable you need. Download Datamaster for free and you're good to go.
07-23-2010, 09:34 AM
#3
Registered User
Thread Starter
Join Date: Jun 2010
Posts: 275
You're on the right track with checking fuel pressure and getting it scanned.
When the engine is under load, there is more cylinder pressure. If there are any weak plugs or ignition components, they will rear their ugly head and will cause a lack of power.
Check www.akmcables.com for the cable you need. Download Datamaster for free and you're good to go.
When the engine is under load, there is more cylinder pressure. If there are any weak plugs or ignition components, they will rear their ugly head and will cause a lack of power.
Check www.akmcables.com for the cable you need. Download Datamaster for free and you're good to go.
07-23-2010, 09:36 AM
#4
Registered User
Join Date: Sep 2001
Location: Woodstown, NJ
Posts: 4,154
07-23-2010, 10:00 AM
#6
Registered User
Join Date: Sep 2001
Location: Woodstown, NJ
Posts: 4,154
That's a serial port. The older style cables will work with them (I have one of those). Most of the newer cables use USB. Just email Andrew and make sure your cable comes with a serial port adapter.
07-23-2010, 10:49 AM
#9
Registered User
Thread Starter
Join Date: Jun 2010
Posts: 275
07-23-2010, 11:56 AM
#10
Registered User
Thread Starter
Join Date: Jun 2010
Posts: 275
07-23-2010, 12:02 PM
#11
Administrator
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 70,650
Use EXACTLY what Andrew at AKM Cables tells you to use. He is the expert.
I'm not sure what you mean when you say "buy that OBD1 you had recommended".... I may have provided you with info regarding a hardware OBD-I scanner, or I may have provided you with links to the correct OBD-I software and the cable. Either will pull the codes. But given a choice, I would recommend you use FreeScan or DataMaster, to provide a data log that will document what happens to the engine when you put it under various throttle loads.
I'm not sure what you mean when you say "buy that OBD1 you had recommended".... I may have provided you with info regarding a hardware OBD-I scanner, or I may have provided you with links to the correct OBD-I software and the cable. Either will pull the codes. But given a choice, I would recommend you use FreeScan or DataMaster, to provide a data log that will document what happens to the engine when you put it under various throttle loads.
07-23-2010, 01:20 PM
#12
Registered User
Join Date: Dec 1969
Location: Little Rock, AR
Posts: 27,709
As far as cables, it depends on what ports you have available on your computer. If you change computers later, it very well may not have a serial port to use. Your choice.
07-24-2010, 07:58 AM
#14
Registered User
Thread Starter
Join Date: Jun 2010
Posts: 275
Okay I put the fuel pressure guage (Made me happy to buy a new tool ) on the fuel valve turned key on engine off read about 42psi and within 3 to 5 seconds tops no pressure at all. Tried it about 10 times all together did it the first five time it held pressure one time. Then key on engine on pressure dropped to about 38psi shook back and forth give or take 1psi. Turned key on engine off pressure next 5 tries did same thing within 3 to 5 tops no pressure at all. I believe it to be the fuel pump, any input is helpful thank you in advance. =)
) on the fuel valve turned key on engine off read about 42psi and within 3 to 5 seconds tops no pressure at all. Tried it about 10 times all together did it the first five time it held pressure one time. Then key on engine on pressure dropped to about 38psi shook back and forth give or take 1psi. Turned key on engine off pressure next 5 tries did same thing within 3 to 5 tops no pressure at all. I believe it to be the fuel pump, any input is helpful thank you in advance. =)
07-24-2010, 12:13 PM
#15
Registered User
Join Date: Sep 2001
Location: Woodstown, NJ
Posts: 4,154
Okay I put the fuel pressure guage (Made me happy to buy a new tool ) on the fuel valve turned key on engine off read about 42psi and within 3 to 5 seconds tops no pressure at all. Tried it about 10 times all together did it the first five time it held pressure one time. Then key on engine on pressure dropped to about 38psi shook back and forth give or take 1psi. Turned key on engine off pressure next 5 tries did same thing within 3 to 5 tops no pressure at all. I believe it to be the fuel pump, any input is helpful thank you in advance. =)
) on the fuel valve turned key on engine off read about 42psi and within 3 to 5 seconds tops no pressure at all. Tried it about 10 times all together did it the first five time it held pressure one time. Then key on engine on pressure dropped to about 38psi shook back and forth give or take 1psi. Turned key on engine off pressure next 5 tries did same thing within 3 to 5 tops no pressure at all. I believe it to be the fuel pump, any input is helpful thank you in advance. =)-Leaky fuel pump check ball
-Leaky fuel pump flex hose
-Leaky fuel pressure regulator
-Leaky fuel injectors
The regulator is the easiest thing to check. Disconnect the vacuum line on the back of the regulator and prime the pump. If fuel comes out of the regulator, the diaphragm is torn and needs to be replaced.
If the regulator checks out okay, then it's time to move on to the injectors. Remove the four bolts holding the fuel rails down and pop out the fuel lines with the injectors still attached. Prime the fuel system while carefully looking at the injectors. If any of them leak, you've got a stuck/leaky injector that must be replaced.
If both of those check out okay, it's fuel pump time.